Consider a cell phone that emits electromagnetic radiation with a frequency of 1.0 GHz (1.0x10 9 Hz)
Question:
Consider a cell phone that emits electromagnetic radiation with a frequency of 1.0 GHz (1.0x109 Hz) with a power of 1.0 W.
(a) What is the approximate electric field amplitude at a distance of 1000 m from the phone? Assume it radiates with spherical wavefronts.
(b) What is the approximate electric field amplitude at your ear as you use the phone? Again assume it radiates with spherical wavefronts.
(c) If the phone can be turned on and transmitting for 3 h before discharging the battery, how much energy can be stored in the battery?
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Step by Step Answer:
Since the phone radiates as a point source we can find the intensity at the given distance The elect...View the full answer
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Related Book For 
College Physics Reasoning and Relationships
ISBN: 978-0840058195
2nd edition
Authors: Nicholas Giordano
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