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7 th Period

7 th Period. EM WAVE KIOSK. Radio Waves. By: Destiny Brown and Anna Jiang. What are radio waves?. Radio waves are electromagnetic waves. They have the longest wavelengths and the lowest frequencies. Radio waves are used for using your cell phone, watching TV, and listening to the radio.

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7 th Period

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  1. 7th Period EM WAVE KIOSK

  2. Radio Waves By: Destiny Brown and Anna Jiang

  3. What are radio waves? • Radio waves are electromagnetic waves. • They have the longest wavelengths and the lowest frequencies. • Radio waves are used for using your cell phone, watching TV, and listening to the radio.

  4. How It Works • Most of the radio waves we receive, through, have traveled through air. Antennas pick up radio waves from the air and send them through wires of your radio. The radio converts the EM waves into the sound that comes out of your radio.

  5. Diagram of the electric (E) and magnetic (H) fields of Radio Waves coming from a radio transmitting antenna

  6. Microwaves By Rj Carter, and Justin Golenburg.

  7. Sight Using Microwaves • Radar is an acronym for “radio detection and ranging”. • Because radar senses electromagnetic waves that are a reflection of an active transmission, radar is considered an active remote sensing system. • Radar was developed to detect objects and determine their range. • The strength and origin of “echoes” received from objects that were hit by the microwaves is then recorded.

  8. Were did Microwaves come from? • A pair of scientists at Bell Laboratories detected background noise using a special low noise antenna. The strange thing about the noise was that it was coming from every direction and did not seem to vary in intensity much at all. • This radiation, which fills the Universe, is believed to be a clue to it’s beginning, something known as the Big Bang.

  9. Microwave Towers can transmit information like telephone calls and computer data from one city to another.

  10. Infrared Rays By: Michelle Becker Anny Lin

  11. All About Infrared Rays • Infrared Rays: Electromagnetic waves have shorter wavelengths and higher frequencies than radio waves. • Infra- means “below” • Infrared- means “below red” • Far infrared waves are thermal. Short infrared waves are not hot at all. Infrared radiation is heat and thermal.

  12. All about infrared rays • Everyday examples of infrared rays are… • The toaster provides the energy to heat your toast in the morning. • When you watch TV. after school using the remote you use wavelengths to switch the channel.

  13. Image This picture shows how hot and cold some of this object is in the background and shows the temperature on the side green is cold and pink is the hottest.

  14. Ultraviolet-alicious!! Maggie McQuaide Ayrin Mason

  15. Ultraviolet waves • Ultraviolet light waves are waves that have shorter wavelengths than visible light waves. There are three regions of ultraviolet waves: Near Ultraviolet Waves (NUV), Far Ultraviolet Waves (FUV), and Extreme Ultraviolet Waves (EUV).

  16. Everyday Examples…… • An everyday example of ultraviolet waves is at a hospital when they treat newborn babies with jaundice using an ultraviolet lamp. The lamp fights bacteria and keeps their skin from yellowing. • The ultraviolet waves from the sun cause sunburn because some UV waves penetrate through the Earth’s atmosphere.

  17. In this illustration, it shows the 3 regions of ultraviolet waves: Near, Far and Extreme.

  18. X-RAYS By Stephen Plank Michael Soltzberg

  19. X-rays • X-rays are a type of electromagnetic waves. • X-rays have smaller wavelengths therefore higher energy than ultraviolet rays • X-rays tend to act like particles rather than waves.

  20. X-ray use in modern day life • X-rays are used in many medical procedures such as dental work and finding possible damage done to bones. • They can use X-rays because you cannot feel them and they cannot penetrate bones or teeth because they are to dense.

  21. X-ray Examples

  22. Carly Hamilton and Dione Gibson Gamma-rays

  23. A gamma ray has the smallest wavelength and highest frequencies of the electromagnetic spectrum. • It is strong enough to cause serious illness. • Gamma rays are also used to kill cancerous cells.

  24. Some objects far out in space give off bursts of gamma rays. Gamma rays travel for billions of years before the reach earth. • Doctors can inject radioactive liquids into the body and use gamma ray detectors to trace them. The detectors build images that doctors can use to examine the inside of the body.

  25. This is a gamma-ray.

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