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Exploring the Electromagnetic Spectrum: A Detailed Review

Dive into the world of the Electromagnetic Spectrum, from radio waves to gamma rays. Discover the diverse energy transmissions, wavelengths, and frequencies. Learn how each part is utilized in technology and daily life. Understand the importance of visible light, UV radiation, X-rays, and gamma rays. Get ready for tests and explore the interactive webpage provided for further study.

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Exploring the Electromagnetic Spectrum: A Detailed Review

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  1. The Plan…15 April 2013 • New Seating Plan with “special” rules… • Review 4.3 Light & Electromagnetic Spectrum • I could have done a better job at this… • Review outstanding Homework: • CYU P. 143 & Worksheet 4.2 • CYU P. 151 & Worksheet 4.3 • NEW today… and for possible Homework • CYU P. 163 #1-12 • Tomorrow: Activity 4.9 • Remember Ch 3 Re-Tests start today! • Ch 4 Test THURSDAY! • I made a webpage!

  2. The Electromagnetic Spectrum • The Electromagnetic Spectrum contains a variety of energy transmissions found at differing wavelengths and frequencies. • Visible Light is found within the spectrum, with it being the only transmission visible to the human eye.

  3. The Parts of the Spectrum • Radio Waves: • Have the longest wavelength and the lowest frequency. • Used to transmit Radio & TV Signals as well as in MRI technology. • Microwaves: • While a “wave” of their own, microwaves are found within the Radio and Infrared Spectrum. • Microwaves have the have the shortest wavelength and highest frequency of the Radio waves. • Used in cooking food, telecommunications, and radar – specifically in tracking objects and forecasting weather. • Microwaves cause water particles in food to vibrate = heat. Bounce back of off items in regards to radar/doppler.

  4. The Spectrum Continues • Infrared Waves • Just on the outside of Microwaves, infrared waves are a heat producing wave. • Found in TV remotes, infrared cameras, and CD-ROM readers. • Next on the Spectrum is Visible Light • This includes ROY G BIV • This is the only part of the spectrum that we can see with our eyes

  5. Shorter wavelengths = more energy • Wavelengths that are shorter than visible light produce more energy • Next on the list is Ultraviolet Waves (UV) • This radiation is found in Sunlight • UV hitting your skin enables it to produce Vitamin D • Too much exposure can = cancer • Sunscreen can protect you from harmful UV radiation

  6. The end of the Spectrum • X-Rays • Shorter wavelength and higher frequency & energy output than UV Radiation. • Used to photograph teeth & bones • Gamma Rays • They are the result of a nuclear reaction • Used in radiation therapy to help kill cancer cells

  7. How you can remember the Spectrum • Radio • Microwave • Infrared Wave • Visible Light • Ultraviolet Waves • X Rays • Gamma Rays R M I V U X G

  8. Now its your turn to Review… • Worksheet 4.3 • CYU P. 163 #1-12 • For Tomorrow • Finish Activity 4.7 from Friday • Start to review for test(s) • Retests today • Ch 4 on Thursday • Webpage in a bit… • www.hillscience8.wikispaces.com

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