The reason why it is favourable to use the radio telescopes to find intelligent life elsewhere.

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Chapter 18, Problem 33QAP

To determine

The reason why it is favourable to use the radio telescopes to find intelligent life elsewhere.

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If you detected radio signals with an average wavelength of 68 cm and suspected that they came from a civilization on a distant Earth-like exoplanet, roughly how much of a change in wavelength (in cm) should you expect to detect as a result of the orbital motion of the distant exoplanet? (Hint: Use the Doppler shift formula.) (Note: Earth's orbital velocity is 30 km/s.)

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