a helium atom is in a galaxy travelling at a


A helium atom is in a galaxy travelling at a speed of 4.89 x 106 m/s away from the Earth.

An astronomer on Earth observes a frequency from the helium atom of 6.52 x 1014 Hz.

What frequency of light is emitted from the helium atom?

 

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Physics: a helium atom is in a galaxy travelling at a
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