an-alien-civilization-sends-signals-toward-earth-and-these-signals-are-detected-

Question

An alien civilization sends signals toward Earth, and these signals are detected as radio waves with frequencies about 10% lower than those measured on Earth. Estimate the speed of the alien civilization's planet using the Doppler effect for light. How would your answer differ if you used the classical Doppler effect?

Accepted Answer

The alien civilization's planet is moving away from us at approximately 0.10c using both methods,

Answer

The alien civilization's planet is moving away from us at approximately 0.5c using both methods,

Answer

The alien civilization's planet is moving away from us at approximately 0.46c under relativity and it cannot be calculated by the classical method,

Answer

The alien civilization's planet is moving away from us at approximately 0.46c under relativity and 0.10c under the classical method

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