Marco


 * H****OW DOES TELEVISION** **USE ELECTROMAGNETIC RADIATION?**

**Notes:**

 * You're eyes are antennas, which can absorb a small quantity of radiation that exist (color).
 * Television = Radio with pictures
 * Radio use sound waves, TV use sound & image waves (travel @ 300,000 km/ second)
 * Electromagnetic Waves = invisible pattern of magnetic & electric
 * Television is 3 part invention; TV camera (captures) -> TV transmitter (sends signal) -> TV receiver (converts)
 * Amplitude Modulation waves keep same frequency & have long wavelength
 * Frequency Modulation waves have higher energy & frequency than AMs

Television is composed by 'tele' which means far & 'vision' which means sight. Television is like a radio with images; when you listen to the BBC on the radio you don't see the reporter, while on the television you see the reporter and not only hear him. These waves come at 300,000 km/ second, making the communication almost in an instant. Television is practically a 3 part invention; TV camera (captures) -> TV transmitter (sends signal) -> TV receiver (converts) Electromagnetic waves, just like what their called, are an invisible pattern of electric and magnetic waves. There are two types of transmission waves; 1. AM (Amplitude Modulation) waves & 2. FM (Frequency Modulation) waves. AM waves have always the same frequency but have long wavelengths making them travel long distances, FM waves have higher energy giving them a higher frequency. Television uses electromagnetic radiation to receive signal waves to convert into sound & images. //Sources:// Explain that Stuff!! __How television (TV) works A simple introduction from Explain that Stuff!__ 16 March 2011. March 2011 [].

Television uses radio waves which have low frequencies & long wavelength, these radio waves are not dangerous themselves. Hospitals have medical machines which can malfunction due to radio waves from TV stations. Television or UHF uses more hertz than radio or AM because TV's emit more hertz or more waves than radios making radios safer. X-rays are more dangerous than radio waves because they have higher frequency.
 * HOW DOES TELEVISION AFFECT HUMAN HEALTH?**
 * 1)  Prentice Hall Science Explorer. "Sound & Light." Michael J. Padilla, Ioannis Miaolis, Martha Cyr, David V. Frank, John G. Little, Steve Milller, Thomas L. Messer, Thomas R. Wellnitz, Nancy Romance, William Tade. __Chemical Building Blocks.__ Boston, 2011. 74-79.