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Objective : Students will … Describe the properties of waves Describe the different kinds of waves in the electromagnetic spectrum. 05/31/11. 05/31/11. Do Now: Some waves have more energy Write a paragraph that explains how the waves are similar and how they are different .

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  1. Objective: Students will… • Describe the properties of waves • Describe the different kinds of waves in the electromagnetic spectrum 05/31/11 05/31/11 • Do Now: • Some waves have more energy • Write a paragraphthat explains how the waves are similar and how they are different. • Use the following words: amplitude, energy, wavelength, and frequency. • Draw the 3 waves. Observe, Question, Comment A B C Notes: 1. How are wavelength and frequency related? Long wavelength Low frequency 2. How are amplitude and energy related? Big Amplitude More Energy 3. How are FREQUENCY and ENERGY related??? Who wants to guess??? High frequency ______Energy Summary: Big Amplitude + High Frequency = VERY HIGH ENERGY 6L 6R

  2. NOTES: Ch.2, Sec.1—Waves/Electromagnetic Spectrum PART 210. Hertz = the unit used to measure frequency of a wave Example: a wave that cycles once per second has a frequency of 1 Hz 11. Electromagnetic Waves = transfer electrical AND magnetic energy --TWO WAVES at 90 degree angle to each other --does NOT need a medium --move at the speed of light --Real-life examples: light, radio waves, microwaves, X-rays, gamma rays Please draw the picture!!! 5R

  3. 14. Visible Light = the electromagnetic waves that the HUMAN eye can see --all the others are INVISIBLE to humans!!! (RADIO WAVES, INFRARED RAYS, ULTRAVIOLET RAYS, X-RAYS, and GAMMA RAYS) Visible Light 6R

  4. NOTES: Ch.2, Sec.1—Waves/Electromagnetic Spectrum PART 2 12. Electromagnetic Radiation= the energy transferred by electromagnetic waves --no need for a medium can move E thru empty space --this means we can see the sun and stars in space!!! 11. Electromagnetic Spectrum = complete range of electromagnetic waves placed in order of increasing FREQUENCY and ENERGY PAGE 44-45 6R

  5. Cornel Notes: Electromagnetic Spectrum • Questions • and • Drawings • Notes page 42 and 43 • What is an Electromagnetic Wave? • - • - • Producing EM waves • - • - • - • Energy • - • - • Speed • - • - • What is the EM Spectrum? p. 43 • - • - • - • Turn to p. 42 in textbook • Read p. 42 and first two paragraphs on p. 43 • Take notes while you read • In the notes section, record the main ideas for each paragraph IN YOUR OWN WORDS • In the left column, record your questions/drawings • When done, record a 3-5 sentence summaryIN YOUR OWN WORDS in the summary box Summary:

  6. Exit Slip: “New Waves for Safe Flying” • Get out a HALF SHEET of paper • Put heading: Full name, date, period, title • Read the article to quietly yourself • Answer the following questions as you read (Do not need to copy question!) • What are the two types of scanning technologies? • How are they the same? • How are they different? • Why are there possible effects to human health? • Why is the backscatter machine considered to be less safe than the millimeter-wave system? (Hint: Which one uses higher energy waves?)

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