Waves & Optics

Question 0

Give an example of a transverse wave

Answer 0

Any Electromagnetic Wave- eg light, infra red, gamma rays

Question 1

What is the definition of a transverse wave?

Answer 1

In a transverse wave the particles vibrate at 90* to the direction the wave is travelling

Question 2

What is one property that all waves share?

Answer 2

All waves transfer energy

Question 3

The definition of a longitudes wave?

Answer 3

In a longitudes wave the particles vibrate back and forth parallel to the direction the wave is travelling

Question 4

Give an example of a longitudes wave

Answer 4

Sound

Question 5

What is the symbol and measurement for wavelength?

Answer 5

Lambda and measured in metres

Question 6

Hertz is measured in Hertz. What is 1 Hz?

Answer 6

1 wave per second

Question 7

True/False- The speed of sound is greater in solids and liquids than it is in gases

Answer 7

True

Question 8

What is the speed that all electromagnetic waves travel at?

Answer 8

3x10*8 m/s

Question 9

True/False-Radio Waves have a greater wavelength than Visible Light

Answer 9

True

Question 10

True/False-Microwaves have a greater frequency than Gamma Rays

Answer 10

False- Gamma rays have a higher frequency but a shorter wave length

Question 11

What is refraction?

Answer 11

Refraction is the change in speed of a wave which may result in a change of direction

Question 12

True/False-The Law Of Reflection- When light is reflected from a plane mirror then the angle of incidence=angle of refraction

Answer 12

True

Question 13

True/False-In a transmitting dish the curved reflector gathers wave energy to provide a stronger signal at the recieved

Answer 13

False-A receiving dish gathers wave energy with the curved reflector to provide a stronger signal at the receiver

Question 14

True/False-When light travels from Air to Glass the light ray bends towards the normal

Answer 14

True

Question 15

When the light travels from glass to air the light Ray bends away from the normal

Answer 15

True

Question 16

What is the name for the oval shaped lens?

Answer 16

Convex or Converging

Question 17

Is a concave lens diverging or converging?

Answer 17

Diverging

Question 18

True/False-The more powerful the lens the longer the focal length

Answer 18

False-The more powerful the lens the shorter the focal length

Question 19

What is focal length measured in?

Answer 19

Metres

Question 20

Would the focal length of a converging lens be positive or negative?

Answer 20

Positive

Question 21

If person is long sighted where are the rays from near by objects focused in the eye?

Answer 21

Behind the retina

Question 22

What lens is used to correct long sight?

Answer 22

Convex/Converging

Question 23

True/False-Being short sighted means that the lens in your eye is not powerful enough

Answer 23

False-Being short sighted means the lens in your eye is too powerful