Light

Question 1

What does Transparent mean?

Answer 1

Transparent materials transmit light which means you can see through them

Question 2

What does translucent mean?

Answer 2

Translucent materials transmit some light but not all which means you cannot see clearly through them.

Question 3

What does Opaque mean?

Answer 3

Opaque materials absorb light which means you cannot see through them and a shadow is formed behind them.

Question 4

What is refraction?

Answer 4

Refraction is the change in angle of light when it passes from one transparent medium to another. This happens because it changes speed.

Question 5

What is the job of the lens?

Answer 5

To focus light

Question 6

What is the job of the cornea?

Answer 6

To protect the eye

Question 7

What is the job of the iris?

Answer 7

It changes size to contract/dilate the pupil

Question 8

What is the job of the pupil?

Answer 8

To allow light to pass through.
The Gap the light passes through

Question 9

What is the job of the retina?

Answer 9

To collect light

Question 10

What is the job of the optic nerve?

Answer 10

To send an electrical signal to the brain
Sends an electrical signal to the brain

Question 11

What do you call an object which produces light?
And its antonym

Answer 11

Luminous
Non-luminous

Question 12

What happens to light when it hits an object?

Answer 12

It can be either absorbed, reflected or transmitted

Question 13

What is the speed of light?

Answer 13

300,000,000 m/s
300,000 km/s

Question 14

What are the primary colours?

Answer 14

Red, Green & Blue

Question 15

What are the secondary colours?

Answer 15

Magenta, Cyan & Yellow

Question 16

Which colour absorbs the most light?

Answer 16

Black

Question 17

Which colour reflects the most light?

Answer 17

White

Question 18

What is white light made of?

Answer 18

All the colours

Question 19

What is the law of reflection?

Answer 19

Angle of incidence = Angle of reflection

Question 20

There is a Yellow Filter. Which colour light can pass through?

Answer 20

Red and Green

Question 21

There is a Magenta filter. Which colour light can pass through?

Answer 21

Red and Blue

Question 22

There is a Cyan filter. Which colour light can pass through?

Answer 22

Blue and Green

Question 23

There is a Cyan filter. There is Red light. What colour will there be?

Answer 23

Black

Question 24

What does amplitude mean?

Answer 24

Amplitude is the height of a wave

Question 25

What does Frequency mean?

Answer 25

Frequency is the number of waves that pass a point in a second

Question 26

What does Wavelength mean?

Answer 26

The wavelength is the length of a wave.

Question 27

What type of wave is light?

Answer 27

Transverse