1 / 18

Electromagnetic Radiation

Electromagnetic Radiation. Waves… a review. Most waves are either longitudinal or transverse. Sound waves are longitudinal. But all electromagnetic waves are transverse…. ?. ?. Electromagnetic Spectrum BBC Video Clip.

tomm
Télécharger la présentation

Electromagnetic Radiation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Electromagnetic Radiation

  2. Waves… a review • Most waves are either longitudinal or transverse. • Sound waves are longitudinal. • But all electromagnetic waves are transverse…

  3. ? ?

  4. Electromagnetic Spectrum BBC Video Clip

  5. What does this picture show about the relationship between frequency and wavelength?

  6. Types of EM Radiation • Radiowaves • lowest energy EM radiation

  7. Electromagnetic waves • Produced by the movement of electrically charged particles • Can travel in a “vacuum” (they do NOT need a medium) • Travel at the speed of light • Also known as EM waves

  8. Radio waves • Longest wavelength EM waves • Uses: • TV broadcasting • AM and FM broadcast radio • Heart rate monitors • Cell phone communication • MRI (MAGNETIC RESONACE IMAGING) • Uses Short wave radio waves with a magnet to create an image

  9. Microwaves • Wavelengths from 1 mm- 1 m • Uses: • Microwave ovens • Bluetooth headsets • Broadband Wireless Internet • Radar • GPS

  10. Infrared Radiation • Wavelengths in between microwaves and visible light • Uses: • Night vision goggles • Remote controls • Heat-seeking missiles

  11. Visible light • Only type of EM wave able to be detected by the human eye • Violet is the highest frequency light • Red light is the lowest frequency light

  12. Ultraviolet • Shorter wavelengths than visible light • Uses: • Black lights • Security images on money • Harmful to living things • Used to sterilize medical equipment • Too much causes sun burn • Extremely high exposure can cause skin cancer

  13. X-rays • Tiny wavelength, high energy waves • Uses: • Medical imaging • Airport security • Moderate dose can damaging to cells

  14. Gamma Rays • Smallest wavelengths, highest energy EM waves • Uses • Sterilizes medical equipment • Cancer treatment to kill cancer cells • Kills nearly all living cells.

  15. Extention • Catch a Wave – Discovery Education Exploration

More Related