Making Colours

Question 1

What are the primary colours in physics?

Answer 1

RGB (Red, Green, Blue)

Question 2

Why does a banana look yellow?

Answer 2

A banana reflects yellow and absorbs all other colours

Question 3

Does black absorb or reflect all colours?

Answer 3

Absorbs

Question 4

Does white reflect or absorb all colours?

Answer 4

Reflects

Question 5

What happens with a red filter?

Answer 5

Red light is transmitted, blue and green are absorbed

Question 6

What happens if you use 2 primary coloured filters?

Answer 6

No light will get through

Question 7

What happens when you put white light through two filters?

Answer 7

Because each filter absorbs 2 colours of light, all three colours are absorbed

Question 8

What happens when you shine white light on different coloured (in this case red) paper and why?

Answer 8

Red paper reflects red light, but absorbs the other colours

Question 9

What happens when you shine coloured light on different coloured paper and why?

Answer 9

When red or green light is shone onto blue paper, the blue paper absorbs the red light and it appears dark.
When blue light is shone onto blue paper, it reflects the blue light, so when we look at it, it appears to be blue.

Question 10

What happens when white light shines on a magenta surface?

Answer 10

When white light shines on a magenta surface, the blue and red parts of the light are reflected, and the green part is absorbed