When the Voyager 2 spacecraft passed Neptune in 1989, it was (4.5 times 10^{9} mathrm{~km}) from the
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When the Voyager 2 spacecraft passed Neptune in 1989, it was \(4.5 \times 10^{9} \mathrm{~km}\) from the earth. Its radio transmitter, with which it sent back data and images, broadcast with a mere \(21 \mathrm{~W}\) of power. Assuming that the transmitter broadcast equally in all directions,
a. What signal intensity was received on the earth?
b. What electric field amplitude was detected?
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Related Book For 
College Physics A Strategic Approach
ISBN: 9780321907240
3rd Edition
Authors: Randall D. Knight, Brian Jones, Stuart Field
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