1. Optics Review 4.1 to 4.3 Light to colour

2. 4.1 Producing Light Incandescent light is the result of: a)Heating electrons b)Living organisms c)Chemical reactions d)All of the above

3. 4.1 Producing Light Incandescent light is the result of: a)Heating electrons b)Living organisms c)Chemical reactions d)All of the above

4. Identify the type of light produced as incandescent or luminescent A

5. incandescent A

6. Identify the type of light produced as incandescent or luminescent B

7. incandescent B

8. Identify the type of light produced as incandescent or luminescent C

9. luminescent C

10. Identify the type of light produced as incandescent or luminescent D

11. luminescent D

12. Identify the type of light produced as incandescent or luminescent E

13. luminescent E

14. Identify the type of light produced as incandescent or luminescent F

15. incandescent F

16. Identify the type of light produced as incandescent or luminescent G

17. luminescent G

18. Identify this structure. Label A,B and C

19. It’s a wave – the distance between two crests

20. What is this a diagram of?

21. Electromagnetic spectrum

22. What colours make up the visible light? Red Orange Yellow Green Blue Indigo Violet

23. Match the wavelengths A) atom B) bee C) football field D) bacteria A) x-rays B) microwaves C) radio waves D) infrared

24. Sort these wavelengths from longest to shortest

25. A)How does light travel? B)What symbol is used to show this? In a straight line A ray Laser

26. Explain how we see objects (use a diagram) Light travels from a source to an object Light reflects from the object into our eyes

27. Identify the type of material used and the transmission: glassWax paper Brick wall A C B

28. Identify the type of material used and the transmission: glass A)Transparent – light travels through Wax paper C)Translucent – some light travels through but is scattered, and some is reflected Brick wall B) Opaque – no light travels through it is all reflected

29. Explain why see the red apple as “red” White light hits the apple But only red is reflected

30. Why do we see blue and yellow panes of stained glass?

31. The glass is transparent so light travels through it There is a pigment in the glass, so that colour is transmitted (.i.e blue) and all other colours are absorbed.

32. Why do we see colours? We see colours because the come cells in our eyes respond to R, G, B wavlengths of light

33. State the Additive Primary Colours Red Green Blue

34. State the Additive Secondary Colours yellow cyan magenta

35. State the Subtractive Primary Colours yellow cyanmagenta

36. State the Subtractive Secondary Colours blue red green

37. What are complementary colours? Colours that are opposite each other on the colour wheel The secondary colour and the primary colour that are opposite each other i.e. red is complementary to cyan

38. magenta film R G B White light Write the colour equation for:

39. magenta film R G B White light W -W -G =G = B R (R +B)(R +B)

40. Good luck