Redshift and blueshift describe the change in the frequency of a light wave depending on whether an object is moving toward or away from us. When an object is moving away from us, the light from the object is known as redshift...
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Redshift and blueshift describe the change in the frequency of a light wave depending on whether an object is moving toward or away from us. When an object is moving away from us, the light from the object is known as redshift...