P5 - Space For Reflection Flashcards

Question 1

Q

P5 - Space for Reflection

What happens if the distance from a planet is doubled (gravity)?

Answer

A

Gravitational force decreases by a factor of 4 (2²)

Question 2

Q

P5 - Space for Reflection

What is the formula for gravity?

Answer

A

F ∝ 1/d²

Question 3

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P5 - Space for Reflection

What does gravity provide to ensure planets orbit in a circular motion?

Answer

A

A centripetal force - it is directed to the centre of the circle.

Question 4

Q

P5 - Space for Reflection

What happens if a planet is twice as close (gravity)?

Answer

A

Gravitational force increases by a factor of 4

Question 5

Q

P5 - Space for Reflection

What is speed?

Answer

A

How fast something’s going

Question 6

Q

P5 - Space for Reflection

Why is velocity a more useful measure of motion?

Answer

A

Because it describes both the speed and direction

Question 7

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P5 - Space for Reflection

What is a scalar quantity?

Answer

A

A quantity like speed that has only a number

Question 8

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P5 - Space for Reflection

What are some examples of scalar quantities?

Answer

A

Speed Mass Temperature Time Length

Question 9

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P5 - Space for Reflection

What is a vector quantity?

Answer

A

A quantity like velocity that has a direction and a number

Question 10

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P5 - Space for Reflection

What are some examples of vector quantities?

Answer

A

Velocity Force Displacement Acceleration Momentum

Question 11

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P5 - Space for Reflection

What is relative speed?

Answer

A

How fast something is going relative to something else.

Question 12

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P5 - Space for Reflection

What will the relative speed be of a car going the same way as you?

Answer

A

The car will have a small speed relative to your car

Question 13

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P5 - Space for Reflection

What will the relative speed be of a car going the opposite direction to you?

Answer

A

The car will have a bigger speed relative to your car.

Question 14

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P5 - Space for Reflection

What happens to the vectors if two things are moving in the same directions?

Answer

A

The vectors are added

Question 15

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P5 - Space for Reflection

What happens to the vectors if two things are moving in the same directions?

Answer

A

Vectors are subtracted

Question 16

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P5 - Space for Reflection

What is used if an object mov against the current e.g. Across the wind?

Answer

A

Pythagoras theorem. Velocity is needed.

Question 17

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P5 - Space for Reflection

What does u stand for in the equations of motion?

Answer

A

Initial velocity

Question 18

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P5 - Space for Reflection

What does v stand for in the equations of motion?

Answer

A

Final velocity

Question 19

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P5 - Space for Reflection

What does s stand for in the equations of motion?

Answer

A

Distance (or displacement)

Question 20

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P5 - Space for Reflection

What does t stand for in the equations of motion?

Question 21

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P5 - Space for Reflection

What does a stand for in the equations of motion?

Answer

A

Acceleration

Question 22

Q

P5 - Space for Reflection

What is a projectile?

Answer

A

Something that is projected, or dropped and only has Earth’s gravitational field acting on it.

Question 23

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P5 - Space for Reflection

Give some examples of projectiles…

Answer

A

Golf ball, missile, football.

Question 24

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P5 - Space for Reflection

What is a trajectory?

Answer

A

The path a projectile takes

Question 25

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P5 - Space for Reflection

What shape is a projectile trajectory?

Answer

A

Parabolic

Question 26

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P5 - Space for Reflection

What does the distance a projectile travels depend on?

Answer

A

Angle it is launched at.

Question 27

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P5 - Space for Reflection

At what angle will a projectile travel the furthest?

Answer

A

45 degrees

Question 28

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P5 - Space for Reflection

What happens to the projectile if launched at less than 45 degrees?

Answer

A

Won’t travel as far

Question 29

Q

P5 - Space for Reflection

What happens to the distance travelled by the projectile if launched at more than 45 degrees?

Answer

A

Projectile will take longer to hit ground and won’t travel as far

Question 30

Q

P5 - Space for Reflection

How is motion split up?

Answer

A

Into horizontal and vertical

Question 31

Q

P5 - Space for Reflection

How does gravity affect motion?

Answer

A

Acts downwards - doesn’t affect horizontal at all.

Question 32

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P5 - Space for Reflection

Why does an object launched horizontally accelerate vertically?

Answer

A

Due to gravity. Has no horizontal acceleration (velocity stays same).

Question 33

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P5 - Space for Reflection

How is the resultant velocity calculated?

Answer

A

The vector sum of the separate motions

Question 34

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P5 - Space for Reflection

What happens when an object exerts a force on another object?

Answer

A

It always experiences a force in return.

Question 35

Q

P5 - Space for Reflection

What is an interaction pair?

Answer

A

When an object exerts a force and experiences one in return

Question 36

Q

P5 - Space for Reflection

What is Newton’s Third Law of Motion?

Answer

A

If object A exerts a force in object B, then object B exerts an equal and opposite force on object A.

Question 37

Q

P5 - Space for Reflection

What is the equation for momentum?

Answer

A

Mass x velocity

Question 38

Q

P5 - Space for Reflection

What are the units for momentum?

Question 39

Q

P5 - Space for Reflection

In a collision when no other forces are involved, what happens to momentum?

Answer

A

It is conserved

Question 40

Q

P5 - Space for Reflection

What does coalesce mean?

Answer

A

Join together (when two objects collide)

Question 41

Q

P5 - Space for Reflection

What does m1 stand for?

Answer

A

Mass of first object

Question 42

Q

P5 - Space for Reflection

What does m2 stand for?

Answer

A

Mass of second object

Question 43

Q

P5 - Space for Reflection

What does u1 stand for?

Answer

A

Velocity of first object

Question 44

Q

P5 - Space for Reflection

What does u2 stand for?

Answer

A

Velocity of second object

Question 45

Q

P5 - Space for Reflection

What does v stand for in the momentum equation?

Answer

A

Velocity of combined objects

Question 46

Q

P5 - Space for Reflection

If the forces are equal how does anything move?

Answer

A

The forces are acting on different objects

Question 47

Q

P5 - Space for Reflection

What does kinetic theory say that gases consist of?

Answer

A

Very small particles constantly moving in random directions.

Question 48

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P5 - Space for Reflection

How much space do the gas particles take up?

Answer

A

Hardly any - most of gas is empty space.

Question 49

Q

P5 - Space for Reflection

What do the particles in a gas do with each other?

Answer

A

Constantly collide and bounce off each other (or off the walls).

Question 50

Q

P5 - Space for Reflection

Why do gas particles exert a force when they collide?

Answer

A

Because gas particles have some mass.

Question 51

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P5 - Space for Reflection

What happens with gas particles in a sealed container?

Answer

A

Gas particles smash against container walls - creates outward pressure.

Question 52

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P5 - Space for Reflection

What happens when the same volume of gas is put in a bigger container?

Answer

A

Larger volume decreases pressure. Fewer collisions between gas particles and walls.

Question 53

Q

P5 - Space for Reflection

What happens when the volume is reduced in a gas container?

Answer

A

Particles are more squashed - hit walls more often - pressure increase.

Question 54

Q

P5 - Space for Reflection

What does the pressure of a gas depend on?

Answer

A

How fast the particles are moving and how often they hit the container walls.

Question 55

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P5 - Space for Reflection

What happens if you heat a gas?

Answer

A

Particles move faster and have more kinetic energy. Hit container wall more often, creating more pressure.

Question 56

Q

P5 - Space for Reflection

What happens if a gas is cooled?

Answer

A

Particles have less kinetic energy - hit walls with less force and less often - pressure reduced.

Question 57

Q

P5 - Space for Reflection

As well as moving and having a mass, what else do gas particles have?

Question 58

Q

P5 - Space for Reflection

What happens to momentum when gas particles hit the container walls?

Answer

A

Changes velocity and momentum - exerts force on container (pressure).

Question 59

Q

P5 - Space for Reflection

What is an orbit?

Answer

A

A balance between the forward motion of an object and a force pulling it inwards. (centripetal)

Question 60

Q

P5 - Space for Reflection

What provides the centripetal force so the planets orbit the Sun in orbits?

Answer

A

Gravitational force between each planet and the sun.

Question 61

Q

P5 - Space for Reflection

There must be a force acting on it if…

Answer

A

An object is travelling in a circle and constantly changing direction.

Question 62

Q

P5 - Space for Reflection

Why does the moon orbit the earth?

Answer

A

Because of the centripetal force produced by the gravitational force between Earth and Moon.

Question 63

Q

P5 - Space for Reflection

What happens to gravity the closer you get to a star or planet?

Answer

A

Stronger force of attraction

Question 64

Q

P5 - Space for Reflection

What does a stronger force of attraction mean the planets do?

Answer

A

Planets nearer sun move faster and cover orbits quicker.

Answer 62

A

Moons, artificial satellites and space stations.

Answer 63

A

Highly elliptical orbits

Answer 64

A

Greater the gravitational force of attraction. Travel much faster here.

Answer 65

A

Quite high orbit. Above equator. Orbit once every 24hrs.

Answer 66

A

Over same point. Earth rotates with them.

Answer 67

A

Geostationary artificial satellites/geosynchronous satellites.

Answer 68

A

Telephone, TV and radio.

Answer 69

A

Stay at same point above Earth and can transfer signals from one side of earth to another in fraction of a second.

Answer 70

A

Too high and too stationary

Answer 71

A

Low polar orbit, passing over both poles.

Answer 72

A

Satellite sweeps over both poles whilst earth rotates beneath it.

Answer 73

A

Much closer to earth = pull of gravity stronger and move faster.

Answer 74

A

Often under 2 hours

Answer 75

A

It can scan the next bit of globe and allows whole surface. To be monitored each day.

Answer 76

A

Microwaves

Answer 77

A

From transmitter. Picked up by satellite receiver dish orbiting 1000s of km above Earth. Satellite transmits signal back to earth in different direction and received by satellite dish on ground. OR satellites receiving signal retransmit it to other satellites and eventually back to earth.

Answer 78

A

High frequency - over 3,000MHz (3GHz)

Answer 79

A

They pass easily through the atmosphere to satellites orbiting Earth.

Answer 80

A

Those in low orbit use lower frequencies.

Answer 81

A

They travel over long distances (losing intensity and picking up interference).

Answer 82

A

High quality and don’t suffer as much interference.

Answer 83

A

image size ÷ object size

Answer 84

A

Convex lenses

Answer 85

A

Closer to the lens than the focal length

Answer 86

A

Virtual image

Answer 87

A

Light from object travels to camera and is refracted by lens, forming an image on the light sensor.

Answer 88

A

Real image - light rays actually meet

Answer 89

A

Smaller than object because object’s further away than focal length of lens

Answer 90

A

Inverted (upside down)

Answer 91

A

Object much closer than focal length

Answer 92

A

Upside down and very close to lens

Answer 93

A

Refracted by lens

Answer 94

A

Real, inverted and magnified image on screen

Answer 95

A

When the light that forms the image converges on the screen or sensor

Answer 96

A

By moving the lens closer to or further from the object

Answer 97

A

The further from the lens the image is formed

Answer 98

A

When distance travelled by waves from both speakers is either same or different by a WHOLE NUMBER of wavelengths.

Answer 99

A

When difference in distance travelled by waves from both speakers is ^₁/₂wavelength, 1 ^₁/₂ wavelength, 2 ^₁/₂ wavelength, etc.

Answer 100

A

Difference in distance travelled by waves from both speakers

Answer 101

A

Interference pattern

Answer 102

A

Pattern of constructive (loud) and destructive (quiet) interference. Applies for all type of waves.

Answer 103

A

A coherent wave source

Answer 104

A

Waves at same frequency/wavelength
Waves in phase (troughs and crests line up)
Waves have same amplitude

Answer 105

A

Monochromatic light (type produces interference patterns)

Answer 106

A

Thay behave differently in the atmosphere

Answer 107

A

Radiowaves reflected off ionosphere, allowing wave to travel longer distances and deal with Earth’s curvature.

Answer 108

A

Radiowaves and Microwaves pass straight through atmosphere so transmissions must be in line of sight (can’t reflect off atmosphere).

Answer 109

A

Rain and dust in atmosphere absorb and scatter microwaves. This reduces signal strength, so highest frequency that can be used for satellite transmission is about 30GHz.

Answer 110

A

Either loud sound or almost nothing

Answer 111

A

Loud sound - waves in phase and amplitude doubles

Answer 112

A

Almost no sound - waves exactly out of phase, cancel out.

Answer 113

A

They diffract

Answer 114

A

One which is about the same size as the wavelength.

Answer 115

A

When size of gap = wavelength of wave

Answer 116

A

Can diffract over hills, through tunnels and over horizon.

Answer 117

A

Using radiowaves (and a dish) and are received by an aerial.

Answer 118

A

Dishes are many times larger than wavelength so waves don’t diffract much - producing a narrow beam.

Answer 119

A

Some kind of disturbance.

Answer 120

A

Water particles

Answer 121

A

Air particles

Answer 122

A

Electric and Magnetic fields

Answer 123

A

Waves disturb in the same direction and reinforce each other.

Answer 124

A

Waves disturb in opposite directions and cancel each other out.

Answer 125

A

The sum of the displacements (taking into account direction) of the wave at that point.

Answer 126

A

When waves of equal frequency or wavelength overlap.

Answer 127

A

Light from each point along the gap diffracts.

Answer 128

A

About the same size as the wavelength of light.

Answer 129

A

A bright central fringe, with alternating dark and bright fringes on either side.

Answer 130

A

Particle theory - Isaac Newton
Wave theory - Christiaan Huygens

Answer 131

A

Reflection and refraction

Answer 132

A

Diffraction and interference

Answer 133

A

They are both unique to waves

Answer 134

A

That light could diffract (through 2 narrow slits) and interfere (to form interference patterns on screen).

Answer 135

A

A coherent light source (e.g. laser) shone through two narrow slits.

Answer 136

A

It shows properties of a wave (diffraction, interference and polarisation).

Answer 137

A

Transverse - vibrations at 90º to direction of travel.

Answer 138

A

Shake a rope up and down/side to side, or in a mixture of directions.

Answer 139

A

Filtering out all vibrations of waves except a particular direction.

Answer 140

A

Vibrations in different directions

Answer 141

A

Filter only transmits vibrations in one particular direction.

Answer 142

A

Vibrations in one direction only

Answer 143

A

It is partly plane polarised

Answer 144

A

Polarising filters - can filter out reflected glare from sea/snow

Answer 145

A

When waves change direction as they enter a different medium

Answer 146

A

Change of speed in waves which causes change in wavelength - NO CHANGE IN FREQ

Answer 147

A

Changes speed

Answer 148

A

Wave bends towards normal

Answer 149

A

Wave bends away from the normal.

Answer 150

A

²/₃ normal speed in air (about 2x10⁸m/s rather than 3 x 10⁸m/s)

Answer 151

A

Ratio of speed of light in a vacuum to the speed of light in a medium.

Answer 152

A

The amount of bending

Answer 153

A

The more the light bends when it enters/leaves the medium.

Answer 154

A

No change in direction - change in speed and wavelength

Answer 155

A

speed of light (c) ÷ speed of light in medium (v)

Answer 156

A

High (around 1.5) - light slows down a lot in glass

Answer 157

A

Lower (around 1.33) - light slows down less in water than in glass.

Answer 158

A

About same as in a vacuum - 1.

Answer 159

A

They travel at different speeds in any given medium (but same in a vacuum).

Answer 160

A

Red - refracted least and has lowest refractive index (1.514…)

Answer 161

A

Blue - higher refractive index (1.523…)

Answer 162

A

Make different colours of white light refract, producing a spectrum - dispersion.

Answer 163

A

When a spectrum is produced to show colours of rainbow.

Answer 164

A

When light travels from a more dense medium with a higher RI to a less dense medium with a lower RI.

E.g. Glass to water

Answer 165

A

When angle of incidence is greater than critical angle, ray of light won’t come out but is reflected back into medium.

Answer 166

A

Most light passes through into air but little bit is internally reflected.

Answer 167

A

Emerging ray travels along the surface. Quite a bit internal reflection.

Answer 168

A

No light comes out - all totally internally reflected

Answer 169

A

The lower the critical angle will be.

Answer 170

A

About 42º

Answer 171

A

45º can be used to get TIR e.g. optical fibres

Answer 172

A

Optical fibres, prisms in binoculars, reflectors, road signs and cat’s eyes.

Answer 173

A

Where light rays from an object come together to form an image on a screen (inc. retina - eye’s screen).

Answer 174

A

Project them onto a screen

Answer 175

A

When rays diverge so light from object appears to come from a different place.

Answer 176

A

Project it onto a screen

Answer 177

A

Virtual - object (face) appears behind mirror.

Answer 178

A

Virtual - appears bigger and further away than it actually is.

Answer 179

A

How big compared to original
Real or virtual
Upright or inverted
Where it is (in relation to lens and focal point)

Answer 180

A

Rays converge to a focus

Answer 181

A

Focuses them at a point - focal point

Answer 182

A

Distance between centre of lens and focal point

Answer 183

A

Slows down upon entry and bends towards normal.

Answer 184

A

Speeds up - bends away from normal

Answer 185

A

All the rays hitting different parts of lens are bent towards some focal point to form image.

Answer 186

A

Pass straight through

Answer 187

A

At same angle as entry but on opposite side to principal axis, so bent same amount - opposite direction.

Answer 188

A

Turns diverging rays into parallel light

Answer 189

A

Real or virtual depending on how close object is to lens

Answer 190

A

Real, inverted image, same size as object and at 2F

Answer 191

A

Real, inverted image bigger than object and beyond 2F

Answer 192

A

Virtual image, right way up, bigger than object and on same side of lens.

Answer 193

A

What happens if the distance from a planet is doubled (gravity)?

Answer 194

A

What is the formula for gravity?

Answer 195

A

What does gravity provide to ensure planets orbit in a circular motion?

Answer 196

A

What happens if a planet is twice as close (gravity)?

Answer 197

A

What is speed?

Answer 198

A

Why is velocity a more useful measure of motion?

Answer 199

A

What is a scalar quantity?

Answer 200

A

What are some examples of scalar quantities?

Answer 201

A

What is a vector quantity?

Answer 202

A

What are some examples of vector quantities?

Answer 203

A

What is relative speed?

Answer 204

A

What will the relative speed be of a car going the same way as you?

Answer 205

A

What will the relative speed be of a car going the opposite direction to you?

Answer 206

A

What happens to the vectors if two things are moving in the same directions?

Answer 207

A

What happens to the vectors if two things are moving in the same directions?

Answer 208

A

What is used if an object mov against the current e.g. Across the wind?

Answer 209

A

What does u stand for in the equations of motion?

Answer 210

A

What does v stand for in the equations of motion?

Answer 211

A

What does s stand for in the equations of motion?

Answer 212

A

What does t stand for in the equations of motion?

Answer 213

A

What does a stand for in the equations of motion?

Answer 214

A

What is a projectile?

Answer 215

A

Give some examples of projectiles…

Answer 216

A

What is a trajectory?

Answer 217

A

What shape is a projectile trajectory?

Answer 218

A

What does the distance a projectile travels depend on?

Answer 219

A

At what angle will a projectile travel the furthest?

Answer 220

A

What happens to the projectile if launched at less than 45 degrees?

Answer 221

A

What happens to the distance travelled by the projectile if launched at more than 45 degrees?

Answer 222

A

How is motion split up?

Answer 223

A

How does gravity affect motion?

Answer 224

A

Why does an object launched horizontally accelerate vertically?

Answer 225

A

How is the resultant velocity calculated?

Answer 226

A

What happens when an object exerts a force on another object?

Answer 227

A

What is an interaction pair?

Answer 228

A

What is Newton’s Third Law of Motion?

Answer 229

A

What is the equation for momentum?

Answer 230

A

What are the units for momentum?

Answer 231

A

In a collision when no other forces are involved, what happens to momentum?

Answer 232

A

What does coalesce mean?

Answer 233

A

What does m1 stand for?

Answer 234

A

What does m2 stand for?

Answer 235

A

What does u1 stand for?

Answer 236

A

What does u2 stand for?

Answer 237

A

What does v stand for in the momentum equation?

Answer 238

A

If the forces are equal how does anything move?

Answer 239

A

What does kinetic theory say that gases consist of?

Answer 240

A

How much space do the gas particles take up?

Answer 241

A

What do the particles in a gas do with each other?

Answer 242

A

Why do gas particles exert a force when they collide?

Answer 243

A

What happens with gas particles in a sealed container?

Answer 244

A

What happens when the same volume of gas is put in a bigger container?

Answer 245

A

What happens when the volume is reduced in a gas container?

Answer 246

A

What does the pressure of a gas depend on?

Answer 247

A

What happens if you heat a gas?

Answer 248

A

What happens if a gas is cooled?

Answer 249

A

As well as moving and having a mass, what else do gas particles have?

Answer 250

A

What happens to momentum when gas particles hit the container walls?

Answer 251

A

What is an orbit?

Answer 252

A

What provides the centripetal force so the planets orbit the Sun in orbits?

Answer 253

A

There must be a force acting on it if…

Answer 254

A

Why does the moon orbit the earth?

Answer 255

A

What happens to gravity the closer you get to a star or planet?

Answer 256

A

What does a stronger force of attraction mean the planets do?

Answer 257

A

In addition to planets/stars, what else are held in orbit by gravity?

Answer 258

A

What type of orbit do periodic comets have?

Answer 259

A

What happens to comets when they are closer to the sun?

Answer 260

A

What type of orbit do communications satellites need?

Answer 261

A

Whereabouts do communications satellites stay in relation to the earth?

Answer 262

A

What is the name given to communications satellites?

Answer 263

A

What are geostationary satellites ideal for?

Answer 264

A

Why are geostationary satellites ideal for TV, radio and telephone?

Answer 265

A

Why are geostationary satellites not used for weather and spying satellites?

Answer 266

A

What kind of orbit do weather and spying satellites need?

Answer 267

A

What happens in a low polar orbit?

Answer 268

A

What is the difference for low polar orbit satellites in terms of gravity?

Answer 269

A

How long is the orbit of a low polar orbit satellite?

Answer 270

A

What happens each time the low polar orbit satellite orbits and what does this allow?

Answer 271

A

What wave do communications to and from satellites use?

Answer 272

A

How are signals for satellite TV and phones transmitted?

Answer 273

A

What type of frequency do microwaves have?

Answer 274

A

How can microwaves reach distant parts of the planet?

Answer 275

A

How is the frequency different for low orbit satellites than those in a geostationary orbit?

Answer 276

A

Why do satellite signals weaken?

Answer 277

A

Why are digital signals used for satellites?

Answer 278

A

What is the magnification formula?

Answer 279

A

What type of lenses do magnifying glasses use to create images?

Answer 280

A

Where must the object being magnified be placed?

Answer 281

A

What image is produced from a magnifying glass?

Answer 282

A

What are the stages when photographing an object?

Answer 283

A

What is the image type when taking a photograph?

Answer 284

A

What is the image size when taking photos? Why?

Answer 285

A

How does the image appear in a photo?

Answer 286

A

Where is an object positioned for a projector?

Answer 287

A

What size if the image from a projector?

Answer 288

A

How does the object need to be placed when projecting it?

Answer 289

A

What happens to light when an object is projected?

Answer 290

A

What image is produced when an object is projected?

Answer 291

A

When will an image be in focus?

Answer 292

A

How is the image focused in cameras/projectors?

Answer 293

A

The closer the object to the lens…

Answer 294

A

If 2 speakers both play the same note at exactly the same time where does constructive interference occur?

Answer 295

A

If 2 speakers both play the same note at exactly the same time, where does destructive interference occur?

Answer 296

A

What is path difference?

Answer 297

A

What is a pattern of loud and quiet called?

Answer 298

A

What is an interference pattern?

Answer 299

A

What do you need to get a stable interference pattern?

Answer 300

A

What does it mean to have a coherent wave source?

Answer 301

A

What is the coherent source for light?

Answer 302

A

Why are EM waves with different frequencies used to transmit different types of communication signals?

Answer 303

A

What happens to signals below 30MHz?

Answer 304

A

What happens to signals between 30MHz and 30GHz?

Answer 305

A

What happens to signals above 30GHz?

Answer 306

A

If 2 speakers both play the same note at exactly the same time, depending on where you stand, what do you hear?

Answer 307

A

If 2 speakers both play the same note at exactly the same time what is heard in areas of constructive interference?

Answer 308

A

If 2 speakers both play the same note at exactly the same time what is heard in areas of destructive interference?

Answer 309

A

What happens to all waves as they pass an object or through a narrow gap?

Answer 310

A

What is classed as a ‘narrow gap’?

Answer 311

A

What achieves the maximum amount of diffraction?

Answer 312

A

Why are long-wave radiowaves great for broadcasting?

Answer 313

A

How are terrestrial TV and radio signals transmitted?

Answer 314

A

How is a narrow beam produced when transmitting microwaves or radiowaves?

Answer 315

A

What do all waves cause in a medium?

Answer 316

A

What do water waves disturb?

Answer 317

A

What do sound waves disturb?

Answer 318

A

What do EM waves disturb?

Answer 319

A

What is constructive interference?

Answer 320

A

What is destructive interference?

Answer 321

A

What is the total amplitude of a wave at any point?

Answer 322

A

When do you get interference patterns?

Answer 323

A

What happens when a wavefront passes through a gap?

Answer 324

A

What must a gap be so that light will diffract?

Answer 325

A

What does an interference pattern create?

Answer 326

A

What 2 theories were there in the 17th Century to explain the nature of light?

Answer 327

A

What could the particle theory explain?

Answer 328

A

What could the particle theory not explain?

Answer 329

A

Why could the particle theory not explain diffraction and interference?

Answer 330

A

What did Thomas Young’s double slit experiment show?

Answer 331

A

What did Thomas Young’s Double Slit experiment involve?

Answer 332

A

What is now accepted about light?

Answer 333

A

What type of wave are EM waves?

Answer 334

A

How can you make (imitate) a transverse wave?

Answer 335

A

What is plane polarisation?

Answer 336

A

What is ordinary light a mixture of?

Answer 337

A

What does passing light through a polarising filter do?

Answer 338

A

What is plane polarised light made up of?

Answer 339

A

What happens when light is reflected from some surfaces like water?

Answer 340

A

What do polaroid sunglasses act as?

Answer 341

A

What is refraction?

Answer 342

A

What causes refraction?

Answer 343

A

What happens when a wave passes the boundary between 2 substances?

Answer 344

A

How does the wave refract if the wave speed decreases?

Answer 345

A

How does the wave refract when the wave speed increases?

Answer 346

A

What does light slow down to when it enters glass?

Answer 347

A

What is refractive index?

Answer 348

A

What is the refractive index basically a measure of?

Answer 349

A

The higher the refractive index…

Answer 350

A

What happens when waves hit a boundary along the normal (exactly 90º)?

Answer 351

A

How is the absolute refractive index of a material defined?

Answer 352

A

What is the refractive index of glass and why?

Answer 353

A

What is the refractive index of water compared to glass?

Answer 354

A

What is the refractive index of air?

Answer 355

A

Why are different colours of light refracted by different amounts?

Answer 356

A

Which colour of light slows down the least?

Answer 357

A

What colour of light is refracted most?

Answer 358

A

What is used to make different colours of light emerge at different angles?

Answer 359

A

What can a prism do to light?

Answer 360

A

What is dispersion?

Answer 361

A

When does TIR only happen?

Answer 362

A

What is TIR?

Answer 363

A

What happens when angle of incidence is less than critical angle?

Answer 364

A

What happens when angle of incidence is equal to critical angle?

Answer 365

A

What happens when angle of incidence is greater than critical angle?

Answer 366

A

Different media have different critical angles so the higher the refractive index of the medium….

Answer 367

A

What is the critical angle for glass?

Answer 368

A

Why is a critical angle of 42 useful in glass?

Answer 369

A

What can TIR be used in?

Answer 370

A

What is a real image?

Answer 371

A

What can you do to real images?

Answer 372

A

What is a virtual image?

Answer 373

A

What can’t you do with a virtual image?

Answer 374

A

What type of image is looking in a mirror?

Answer 375

A

What is the image when you look through a magnfiying glass?

Answer 376

A

What 4 things describe an image?

Answer 377

A

What shape is a converging lens?

Answer 378

A

What does a convex lens do to light?

Answer 379

A

What happens if the rays entering the lens are parallel to each other and to the principal axis?

Answer 380

A

What is the focal length?

Answer 381

A

What happens to the speed of a ray travelling parallel to the principal axis?

Answer 382

A

What happens to a ray travelling parallel to the principal axis when it hits the ‘glass to air’ boundary?

Answer 383

A

When a ray is travelling parallel to the principal axis, what does the curvature of the lens mean?

Answer 384

A

What does a ray passing through the optical centre of the lens appear to do?

Answer 385

A

How does a ray passing through the optical centre of the lens exit?

Answer 386

A

Describe how a convex lens can work in the opposite way…

Answer 387

A

What type of image can convex lenses produce?

Answer 388

A

What will an object at 2F produce?

Answer 389

A

What will an object between F and 2F produce?

Answer 390

A

What will an object nearer than F produce?

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P5 - Space For Reflection Flashcards

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