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Test Flashcards > Gr. 10, Physics > Flashcards

Gr. 10, Physics Flashcards

1
Q

What are the 5 lables in a lightwave

A

Amplitude
Frequency
Wavelength
Crest
Trough

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2
Q

What are the two types of feilds in the electromagnetic wave?

A

magnetic feild (B)
Electric feild (E)

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3
Q

How fast is the speed of light?

A

3.0 x10 8 m/s

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4
Q

What are EM waves built up with?

A

Photons

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5
Q

Of radio waves, Gamma rays, infrared, x-rays, microwaves and ultra violet rays, which ones are short wavelengths and which ones are big?

A

Big - Radio waves, Inrared, Microwaves
Small - Ultraviolet, x-rays, and gamma rays

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6
Q

What is the spectrum the light rays are ranked called?

A

Electromagnetic spectrum

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7
Q

The shorter or the longer the wavelengths, the more energy?

A

Shorter

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8
Q

What is white light?

A

A combination of all colours on the colour spectrum

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9
Q

What are the two broad catagories of light?

A

Incandescent - Electric current passes through a flammable wire and produces heat
Luminescent - electric light runs through a gas and produces a UV light

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10
Q

What is Chemiluminescence?
What is Bioluminescence?
What is Triboluminescence?

A

Chemiluminescence - production of light through a chemical reaction without heat
Bioluminescence - a plant or animals ability to produce light
Triboluminescence - The production of light through friction

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11
Q

In a convex mirror : A ray that is parallel to the Principal Axis will reflect through the _________

A

focal point

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12
Q

In a convex mirror : A ray goes through the focal point will reflect ____________

A

Parallel to the Principle Axis

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13
Q

In a convex mirror : A ray that passes through the center of curvature will _______

A

Reflect back on itself

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14
Q

The image appears where the _________

A

reflected rays intersect

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15
Q

In a concave mirror : A ray parallel to the Principal Axis will _________

A

Reflect as though it came from the focal point, (on the otherside of the mirror)

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16
Q

In a concave mirror : a ray aimed for the focal point will __________

A

Reflects along the Principal Axis

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17
Q

In a concave mirror : A ray aimed for the center of curvature will_______

A

Reflect along itself

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18
Q

If the image is behind the mirror in a reflection it is _______

A

Virtual

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19
Q

What does SALT represent?

A

Size - Bigger or smaller
Attitude - Upright or inverted
Location - Infront or behind mirror
Type - Virtual or real

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20
Q

What is dispersion?

A

The refraction of white light into different colours

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21
Q

What two things do the angle of refraction depend on?

A

The two different mediums
The angle of inception

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22
Q

Oi =
Or =

A

Oi = angle of incidence
Or = angle of refraction

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23
Q

What is the critical angle?
What is the phenominon called?

A

Critical angle - The angle at which the angle of refraction is at 90
This phenominon is called Total Internal Reflection

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24
Q

Total internal reflection only happens when light travels through a medium ______

A

MORE dense to a medium that is LESS dense

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25
Q

What is a lens?

A

transparent material which refracts light rays to form an image

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26
Q

What are the two type sof lenses?

A

Convex (Converging) & Concave (Diverging)

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27
Q

In a lens the real image appears _____ the mirror

A

behind

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28
Q

F =
di =
do =

A

F = focal length
di = image distance
do = object distance

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29
Q

M =
hi =
ho =

A

M = magnification
hi = image height
ho = object height

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30
Q

If F is positive the lens is
if di is posotive then the image is
If hi is posotive then the image is

A

Convex
real
upright

31
Q

Refraction- light bends or changes direction at the ______ between two media

A

Boundary

32
Q

The beam in the first medium is called the ___
The beam in the second medium is called the ___

A

Incident ray
refracted ray

33
Q

When light travels from a less dense material to a more dense one, the light bends ______ the normal

A

Towards = Angle of incidence is greater than angle of refraction

34
Q

When light strikes a surface along the perpendicular, the angle of incidence is _______ along with the angle of refraction.

A

0

35
Q

Snell’s law describes the___________

A

relationship between the angle of incedence and angle of refraction

36
Q

n =

A

Index of refraction

37
Q

What is the index of refraction for, water, vacume and air

A

Water = 1.33
Air = 1.0003
Vacume = 1.00

38
Q

Optical density determines

A

how much energy is being absorbed and re-emmited in a medium

39
Q

The higher the optical density, the _________ the light wave travels

A

slower the light wave

40
Q

as the optical density increases, the value of N ____

A

increases

41
Q

What is the equation for the index refraction / speed of light?

A

n material = C ÷ V material

42
Q

A light wave is transporting ________
When light hits a boundary some energy is
________ to the new medium, some energy
is ________.

A

Energy
Transmitted
Reflected

43
Q

Total internal reflection occurs when all light is
reflected, and there is no ________
This can only occur when light travels from a
_____ density to a _____ density

A

Refracted ray
Higher - Lower

44
Q

What is the equation for calculating the critical angle?

A

nr sinϴr = ni sinϴi

45
Q

Why are dimonds sparkely?

A

Because all the light rays are internally reflected

46
Q

How do fiber optic cables transmit information?

A

Through pulses of light similar to morsecode.

47
Q

What are fiber optic cables used for?

A

Telecomunications

48
Q

What are mirages caused by?

A

Refraction of light in the
Earth’s atmosphere.

49
Q

How are mirages created?

A

There is a hot layer of air with a cold layer of air overtop of it. Light travels faster through hot air, this increase of speed causes a bending of the light rays.

50
Q

are mirages upside down or rightside up?

A

Upside down

51
Q

The separation of light into its spectrum is
called ______

A

dispertion

52
Q

Red light is bent the _____, while violet light is
bent the _____.

A

Least, most

53
Q

The index of refraction depends on the ______ or ______ of light.

A

color,or frequency, of light.

54
Q

What are the two laws of reflection?

A

The angle of incidence (ϴi) = The angle of reflection (ϴr)
The incident ray, the reflected ray, and the
normal all lie in the same plane.

55
Q

If parallel incident rays hit a flat reflective surface the angles of refraction will be ______, If parallel rays hit a rough surface the reflected rays will all be_____. This is a ______

A

the same
different
diffuse reflection

56
Q

REFLECTION =

A

the bouncing back
of light rays from a surface

57
Q

Real image is -
Virtual image is -

A

real = the image infront of the mirror
virtual = the image within the mirror

58
Q

A ray that strikes perpendicular to the mirror
surface reflects ______

A

reflects perpendicular to the mirror.(The
reflected ray is extended beyond the mirror.)

59
Q

A ray that strikes the mirror on an angle reflects ______

A

At the angle of reflection. (this goes beyond the mirror)

60
Q

what are the three types of mirror?

A

Plane (Flat)
Concave (converging / makes image larger)
Convex (diverging / makes image smaller)

61
Q

Why is the word AMBULANCE written reversed?

A

Because a plane mirror reverses left to right.

62
Q

what are the 4 main structures of an eye?

A

Cornea
Aqueous humor
Lens
Vitreous humor

63
Q

Cornea -

A

Outer structure of eye
Protects iris and pupil

64
Q

Aqueous Humor -

A

Clear liquid
Helps maintain pressure in the eye

65
Q

Lens -

A

Behind the opening of the pupil
Elastic - can change its shape to
accomodate

66
Q

Vitreous Humor -

A

Transparent jelly fluid
Makes up most of the eye

67
Q

The image is received by the _____

A

Retina

68
Q

Retina -

A

Inner layer of the eye
made up of rods and cones

69
Q

rods =
cones =

A

Sensitive to dim light (B/W)
Sensitive to daylight (Colour)

70
Q

The image formed on the retina is ____ by the
converging lens of the eye

A

Inverted

71
Q

The image is carried through the retina to the ______

A

Opticnerve

72
Q

The light rays travel through -

A

Eye (cornea 🡪 aqueous humor 🡪 lens 🡪 vitreous humor)
🡪 Retina
🡪 Brain

73
Q

higher index of refraction = _____ speed

A

slower speed

Test Flashcards (14 decks)

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