Student Workbook for College Physics: A Strategic Approach Volume 1 (Chs. 1-16)
3rd Edition
ISBN: 9780321908865
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Textbook Question
Chapter 25, Problem 68GP
When the Voyager 2 spacecraft passed Neptune in 1989, it was 4.5 × 109 km from the earth. Its radio transmitter, with which it sent back data and images, broadcast with a mere 21 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?
(The received signal was slightly stronger than your result because the spacecraft used a directional antenna.)
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Chapter 25 Solutions
Student Workbook for College Physics: A Strategic Approach Volume 1 (Chs. 1-16)
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