Electro-magnetic Spectrum
{"Image DocumentName": "Electro-magnetic Spectrum", "Image ImageDescription": "Electromagnetic frequencies range from 0Hz to millions of Exa hertz. (Exa = 1,000,000,000,000,000,000) The area of interest to us is the audio and radio section of the spectrum. The normal hearing range is about 100Hz to 15 kHz. Electro-magnetic Spectrum. Electromagnetic frequencies range from 0Hz to millions of Exa hertz. (Exa = 1,000,000,000,000,000,000) (Gamma rays are in the 10^23 range \u2013 visible light is 10^14) \u25bc The area of interest to us is the audio and radio section of the spectrum. The normal hearing range is about 100Hz to 15 kHz. The range for audio communication is 300Hz to 3kHz. This is the approx range of a telephone line. Music down a phone line is not good. The range for audio communication is 300Hz to 3kHz. p 13.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}