Do now!

1. Do now! Can you remember what wave intensity is??

2. Electromagnetic spectrum

3. Visible light

4. Visible light λ ≈ 700 nm λ ≈ 420 nm

5. Ultraviolet waves λ ≈ 700 - 420 nm

6. Ultraviolet waves λ ≈ 700 - 420 nm λ ≈ 10-7 - 10-8 m

7. X-rays λ ≈ 700 - 420 nm λ ≈ 10-7 - 10-8 m

8. X-rays λ ≈ 700 - 420 nm λ ≈ 10-7 - 10-8 m λ ≈ 10-9 - 10-11 m

9. Gamma rays λ ≈ 700 - 420 nm λ ≈ 10-7 - 10-8 m λ ≈ 10-9 - 10-11 m

10. Gamma rays λ ≈ 700 - 420 nm λ ≈ 10-7 - 10-8 m λ ≈ 10-12 - 10-14 m λ ≈ 10-9 - 10-11 m

11. Infrared waves λ ≈ 700 - 420 nm λ ≈ 10-7 - 10-8 m λ ≈ 10-9 - 10-11 m λ ≈ 10-12 - 10-14 m

12. Infrared waves λ ≈ 700 - 420 nm λ ≈ 10-7 - 10-8 m λ ≈ 10-4 - 10-6 m λ ≈ 10-9 - 10-11 m λ ≈ 10-12 - 10-14 m

13. Microwaves λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10-7 - 10-8 m λ ≈ 10-9 - 10-11 m λ ≈ 10-12 - 10-14 m

14. Microwaves λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10-7 - 10-8 m λ ≈ 10-9 - 10-11 m λ ≈ 10-2 - 10-3 m λ ≈ 10-12 - 10-14 m

15. Radio waves λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10-7 - 10-8 m λ ≈ 10-9 - 10-11 m λ ≈ 10-2 - 10-3 m λ ≈ 10-12 - 10-14 m

16. Radio waves λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10-7 - 10-8 m λ ≈ 10-9 - 10-11 m λ ≈ 10-2 - 10-3 m λ ≈ 10-1 - 103 m λ ≈ 10-12 - 10-14 m

17. Electromagnetic spectrum λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10-7 - 10-8 m λ ≈ 10-9 - 10-11 m λ ≈ 10-2 - 10-3 m λ ≈ 10-1 - 103 m λ ≈ 10-12 - 10-14 m

18. What do they all have in common? λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10-7 - 10-8 m λ ≈ 10-9 - 10-11 m λ ≈ 10-2 - 10-3 m λ ≈ 10-1 - 103 m λ ≈ 10-12 - 10-14 m

19. What do they all have in common? • They can travel in a vacuum • They travel at 3 x 108m.s-1 in a vacuum (the speed of light) • They are transverse • They are electromagnetic waves (electric and magnetic fields at right angles to each oscillating perpendicularly to the direction of energy transfer)

20. Mini-book

21. Mini-book • One type of EM wave for each page • Each page should contain the range of wavelengths • Each page should contain uses and other interesting information