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Large radio telescopes, like the one in Arecibo, Puerto Rico, can detect extremely weak signals. Suppose one radio telescope is sensitive enough to detect a signal which lays down only 1.2 pW of power on an area of 6.0 × 1014 m². (a) What would be the total power that would be received by the antenna, assuming that its diameter is 370 m? (b) What would be the power of a source at 17000 ly distance from Earth that could provide such a signal? A light-year is the distance light travels in one year.

Large radio telescopes, like the one in Arecibo, Puerto Rico, can detect extremely weak signals. Suppose one radio telescope is sensitive enough to detect a signal which lays down only 1.2 pW of power on an area of 6.0 × 1014 m². (a) What would be the total power that would be received by the antenna, assuming that its diameter is 370 m? (b) What would be the power of a source at 17000 ly distance from Earth that could provide such a signal? A light-year is the distance light travels in one year.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Large radio telescopes, like the one in Arecibo, Puerto Rico, can detect extremely weak signals. Suppose one radio telescope is sensitive enough to detect a signal which lays down only 1.2 pW of power on an area of 6.0 x 1014 m2. (a) What would be the total power that would be received by the antenna, assuming that its diameter is 370 m? (b) What would be the power of a source at 17000 ly distance from Earth that could provide such a signal? A light-year is the distance light travels in one year. (a) Number Units W (b) Number Units W
Transcribed Image Text:Large radio telescopes, like the one in Arecibo, Puerto Rico, can detect extremely weak signals. Suppose one radio telescope is sensitive enough to detect a signal which lays down only 1.2 pW of power on an area of 6.0 x 1014 m2. (a) What would be the total power that would be received by the antenna, assuming that its diameter is 370 m? (b) What would be the power of a source at 17000 ly distance from Earth that could provide such a signal? A light-year is the distance light travels in one year. (a) Number Units W (b) Number Units W
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