Physics, 03.04.2020 05:28, aksambo4707

Intelligent beings in a distant galaxy send a signal to earth in the form of an electromagnetic wave. The frequency of the signal observed on earth is 1.3% greater than the frequency emitted by the source in the distant galaxy. What is the speed vrel of the galaxy relative to the earth?

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Intelligent beings in a distant galaxy send a signal to earth in the form of an electromagnetic wave...