The galaxies are moving away from each other. | vedclass

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(B) The observation that galaxies are moving away from each other is known as the expansion of the universe.This phenomenon is explained by the $Red \

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Red shift

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(B) The observation that galaxies are moving away from each other is known as the expansion of the universe.This phenomenon is explained by the $Red \ shift$ in the light spectra emitted by these galaxies.As galaxies move away from an observer,the light waves they emit are stretched to longer wavelengths,shifting them toward the red end of the electromagnetic spectrum.This is a direct consequence of the $Doppler \ effect$ applied to light,providing evidence for the Big Bang theory.

The galaxies are moving away from each other. This phenomenon is explained by:

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