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Electromagnetic spectrum

Electromagnetic spectrum. Visible light. Visible light. λ ≈ 700 nm. λ ≈ 420 nm. Ultraviolet waves. λ ≈ 700 - 420 nm. Ultraviolet waves. λ ≈ 700 - 420 nm. λ ≈ 10 – 100 nm. X-rays. λ ≈ 700 - 420 nm. λ ≈ 10 – 100 nm. X-rays. λ ≈ 700 - 420 nm. λ ≈ 10 – 100 nm. λ ≈ 1 – 0.01 nm.

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Electromagnetic spectrum

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  1. Electromagnetic spectrum

  2. Visible light

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

  4. Ultraviolet waves λ ≈ 700 - 420 nm

  5. Ultraviolet waves λ ≈ 700 - 420 nm λ ≈ 10 – 100 nm

  6. X-rays λ ≈ 700 - 420 nm λ ≈ 10 – 100 nm

  7. X-rays λ ≈ 700 - 420 nm λ ≈ 10 – 100 nm λ ≈ 1 – 0.01 nm

  8. Gamma rays λ ≈ 700 - 420 nm λ ≈ 10 – 100 nm λ ≈ 1 – 0.01 nm

  9. Gamma rays λ ≈ 700 - 420 nm λ ≈ 10 – 100 nm λ ≈ 10-12 - 10-14 m λ ≈ 1 – 0.01 nm

  10. Infrared waves λ ≈ 700 - 420 nm λ ≈ 10 – 100 nm λ ≈ 1 – 0.01 nm λ ≈ 10-12 - 10-14 m

  11. Infrared waves λ ≈ 700 - 420 nm λ ≈ 10 – 100 nm λ ≈ 10-4 - 10-6 m λ ≈ 1 – 0.01 nm λ ≈ 10-12 - 10-14 m

  12. Microwaves λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10 – 100 nm λ ≈ 1 – 0.01 nm λ ≈ 10-12 - 10-14 m

  13. Microwaves λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10 – 100 nm λ ≈ 1 – 0.01 nm λ ≈ 10-2 - 10-3 m λ ≈ 10-12 - 10-14 m

  14. Radio waves λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10 – 100 nm λ ≈ 1 – 0.01 nm 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 – 100 nm λ ≈ 1 – 0.01 nm λ ≈ 10-2 - 10-3 m λ ≈ 10-1 - 103 m λ ≈ 10-12 - 10-14 m

  16. Electromagnetic spectrum λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10 – 100 nm λ ≈ 1 – 0.01 nm λ ≈ 10-2 - 10-3 m λ ≈ 10-1 - 103 m λ ≈ 10-12 - 10-14 m

  17. Electromagnetic spectrum Long Wavelength Short Wavelength

  18. Electromagnetic spectrum Long Wavelength Short Wavelength High Frequency Low Frequency

  19. What do they all have in common? λ ≈ 700 - 420 nm λ ≈ 10-4 - 10-6 m λ ≈ 10 – 100 nm λ ≈ 1 – 0.01 nm λ ≈ 10-2 - 10-3 m λ ≈ 10-1 - 103 m λ ≈ 10-12 - 10-14 m

  20. 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)

  21. Mini-book

  22. Mini-book • One type of EM wave for each page • Each page should contain the wavelength and frequencies • Each page should contain uses and other interesting information (including dangers) • Attractive to look at (and funny?) • Homework due Friday 29th January

  23. Mini-book • Finish for homework. • Due Friday 29th January

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