The 21-cm line of atomic Hydrogen is very common throughout the Universe that some scientists suggest that if we want to send messages to aliens we should use the frequency of π times this frequency (why?). What is the frequency they suggest to use? A. 4.49 GHz B. 1.43 GHz C. 2.75 GHz D. 3.62 GHz

The 21-cm line of atomic Hydrogen is very common throughout the Universe that some scientists suggest that if we want to send messages to aliens we should use the frequency of π times this frequency (why?). What is the frequency they suggest to use? A. 4.49 GHz B. 1.43 GHz C. 2.75 GHz D. 3.62 GHz

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter24: Electromagnetic Waves

Section: Chapter Questions

Problem 19P

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Question

100%

A. 4.49 GHz

B. 1.43 GHz

C. 2.75 GHz

D. 3.62 GHz

Is the answer B? The use of frequency π times is to avoid destructive interference such that the radio message could travel through space without distortion? Thank you very much!

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