1. 12 / Tuesday
Kaupapa:
Describe the visible light of the electromagnetic spectrum

2. Do you remember? What are the seven EM radiations?
Which one causes sun-burn?
Which one is used in remotes?
Which one has the highest frequency and energy?

3. The Seven Electromagnetic Radiations
Radiowave
Microwave
Infra-Red
Visible Light
Ultra Violet
X-ray
Gamma Ray

12. Purple = Red & Blue
Yellow = Red & Green
Cyan = Blue & Green

13. White = ?

14. White = Red + Orange + Yellow + Green + Blue + Indigo + Violet

15. Remember:
“ROYGBIV”

17. Demo – seven colours in the white light

18. Remember “Roygbiv” Visible Light Spectrum
The visible light spectrum contains ALL of the colours (all frequencies in the range).
We often divide them into the seven colours.
Red (lowest frequency, least energy)
Orange
Yellow
Green
Blue
Indigo
Violet (highest frequency, most energy)
Remember “Roygbiv”

19. Practical – Newton’s Disc

20. What have we learnt today?
Name the seven colours in the visible spectrum in the order of frequency
Which colour has the most amount of energy?