1. Lesson Starter: answer in sentences
In the correct order, write down the colours that make up white light
Explain how rainbows form
What colour refracts a) the most b) the least?

2. Lesson Starter answers
Red, Orange, Yellow, Green, Blue, Indigo, Violet
The droplets of water act as a prism, light is refracted as it enters and spreads to form the spectrum
The light waves are refracted as they enter and leave the prism. The shorter the wavelength of the light, the more it is refracted. As a result, red light is refracted the least and violet light is refracted the most, causing the coloured light to spread out to form a spectrum.

3. To learn about colour mixing
Learning Intention
To learn about colour mixing

4. You can make any colour by mixing three colours
You can make any colour by mixing three colours. Do you know what the PRIMARY COLOURS are?
RED
Green
Light box demo
Blue

5. Mixing Coloured Light: copy
Mix all three and you get...
Blue + Green + Red -> White light
Red light
Green light
Yellow light
Blue light
Red light
Magenta light
Blue light
Green light
Cyan light

6. Mixing Colours

7. Colour wheel: copy
Yellow
Red
Green
Cyan
Magenta
Blue
White

8. Bill Nye the science guy: Light and colour

9. Read Page 61 and answer the questions 1-4
Textbook work
Read Page 61 and answer the questions 1-4

10. Filters coloured light from white light. Filters are used to make
How do they work?
White light
Only red light is transmitted
Red Filter
is made up of 3 primary colours
The green and blue light is absorbed. The red light is transmitted.

11. What happens to the colour of an object when you place a filter around it?

12. Using filters of primary colours: watch
A filter absorbs some colours of white light and lets other colours through to create coloured light.
A red filter absorbs all colours…
…apart from red light.
A blue filter absorbs all colours…
…apart from blue light.
A green filter absorbs all colours...
…apart from green light.

13. Using filters of secondary colours
A magenta filter absorbs all colours…
…apart from red and blue.
A cyan filter absorbs all colours…
…apart from green and blue.
A yellow filter absorbs all colours...
…apart from red and green.

14. Why does a red snooker ball look red in white light?
Remember white light is made of a spectrum of colours.
The snooker ball absorbs all the colours of the spectrum EXCEPT red, so red light is reflected into our eye. The snooker ball appears red.

15. Try These
what primary colour or colours of light will be transmitted by these filters?

16. Filters let certain colours of light pass through, but absorb all other colours.
Object

17. Answer in sentences in your jotter
Which colours of light will a blue filter absorb?
Which colour of light will a blue filter transmit?
Red, green and blue light is passed through a red filter then a green filter. Which colour will be transmitted?

18. Textbook Work
Page 63- questions 1-3