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Objectives

AIM: What is the Electromagnetic Spectrum?. Objectives. Identify the parts of the electromagnetic spectrum Demonstrate the relationship between wavelength and frequency in the EM spectrum. AIM: What is the Electromagnetic Spectrum?. Vocabulary.

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Objectives

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  1. AIM: What is the Electromagnetic Spectrum? Objectives Identify the parts of the electromagnetic spectrum Demonstrate the relationship between wavelength and frequency in the EM spectrum

  2. AIM: What is the Electromagnetic Spectrum? Vocabulary electromagnetic spectrum, radio waves, infrared rays, visible light, ultraviolet rays, x rays, gamma rays Roy G. Biv

  3. AIM: What is the Electromagnetic Spectrum? Concepts: Light is an electromagnetic wave But we can see light. Most E/M waves can not be seen!

  4. AIM: What is the Electromagnetic Spectrum? Concepts: Pure visible white light is actually made up of various colors of the spectrum. This rainbow of colors is clearly visible when looking at light through a prism

  5. AIM: What is the Electromagnetic Spectrum? Demo Examine light through a prism or a spectrometer! What do you see?

  6. Roy g biv

  7. When you look at light through a prism you may see something which looks like this!

  8. AIM: What is the Electromagnetic Spetrum? Pattern Light through a prism is diffracted according to its frequency and wavelength Red has a longer wavelength speed = Frequency x wavelength

  9. Pattern Red has a longer wavelength speed = Frequency x wavelength Since the speed of light is constant What can you conclude about its frequency It must be smaller

  10. Pattern Blue has a shorter wavelength speed = Frequency x wavelength Since the speed of light is constant What can you conclude about its frequency Shorter wavelength = greater frequency!

  11. Long W/L Short W/L Colors of the Spectrum

  12. Radio Waves: Have a long W/L. What type of frequencies would they have?

  13. Microwaves: What are microwaves?

  14. Infrared: You can not see infrared waves. You can feel them as heat

  15. Visible Light: ROY G. BIV

  16. Ultraviolet Ray: Can not be seen. In sunlight. Causes sunburn. Also used to kill bacteria

  17. X Ray: Can not be seen. Have a short W/L. What type of frequency do they have? What are they used for?

  18. Gamma Ray: Have a very short W/L. What type of frequency do they have? Used in nuclear physics

  19. Shorter wavelength= Higher Frequency longer wavelength= lower Frequency

  20. Shorter wavelength= Higher Frequency longer wavelength= lower Frequency

  21. AIM: What is the Electromagnetic Spectrum? Class Activity: W/S Concepts 9-9

  22. AIM: What is the Electromagnetic Spectrum? Homework: INTERNET QUESTIONS

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