Frank D. Drake, an investigator in the SET! (Search for
Chapter 33, Problem 16(choose chapter or problem)
Frank D. Drake, an investigator in the SET! (Search for Extra-Terrestrial Intelligence) program, once said that the large radio telescope in Arecibo, Puerto Rico (Fig. 33-36), "can detect a signal which lays down on the entire surface of the earth a power of only one picowatt." (a) What is the power that would be received by the Arecibo antenna for such a signal? The antenna diameter is 300 m. (b) What would be the power of an isotropic
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