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The Electromagnetic Spectrum—Answer Key - uwyo.edu

The Electromagnetic spectrum Answer Key Radio waves Longest wavelength lowest frequency Wavelength range: 106m to 1m Usually described by their frequency Different types of radio waves (from high f to low f are: RADAR, CB (Citizen s Band), FM, Television, AM, Shortwave, Satellite, Communications AM stands for amplitude modulation and is given in kHz FM stands for frequency modulation and is given in MHz 1st Radio waves were transmitted/detected by Heinrich Hertz The first wireless radio device was invented by: Guglielmo Marconi Can be reflected or transmitted by Earth s atmosphere Cosmic Connection: SETI: Search for Extra Terrestrial Intelligence Closely related to x-ray or gamma-ray events Guglielmo Marconi (1874-1937) Microwaves Name means: small radio waves Wavelength range: 1m to 1 cm Non-ionizing; when absorbed they cause water molecules to vibrate, creating heat. First developed during WWII and used for communications.)

The Electromagnetic Spectrum—Answer Key Radio Waves • Longest wavelength lowest frequency • Wavelength range: 106m to 1m • Usually described by their frequency • Different types of radio waves (from high f to low f are: RADAR, CB (Citizen’s Band), FM, …

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