How high must a receiving antenna be to receive a signal directly from an over-the-horizon transmitter whose antenna is 30 ft high? The distance between antennas is 15 miles?
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How high must a receiving antenna be to receive a signal directly from an over-the-horizon transmitter whose antenna is 30 ft high? The distance between antennas is 15 miles?
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- Sketch iR and Vo for the output network shown:The rate at which information can be transmitted on an electromagnetic wave is proportional to the frequency of the wave. Is this consistent with the fact that laser telephone transmission at visible frequencies carries far more conversations per optical fiber than conventional electronic transmission in a wire? What is the implication for ELF radio communication with submarines?Analyze the diagram below. Which of the following EM waves has the longest wavelength? Wavelength (meters) Radio Microwave Infrared Visible Ultraviolet X-ray Gamma Ray 103 10-2 10-5 .5 x 10-6 10-8 10-10 10-12 wwwwwwwww About the size of... A B с D microwaves gamma rays visible light infrared