GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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true
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false
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Either A or B
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None of the above
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Detailed explanation-1: -"Blueshift” is a term that astronomers use to describe an object that is moving toward another object or toward us. Someone will say, “That galaxy is blueshifted with respect to the Milky Way", for example. It means that the galaxy is moving toward our point in space.
Detailed explanation-2: -Redshift and blueshift describe the change in the frequency of a light wave depending on whether an object is moving towards or away from us. When an object is moving away from us, the light from the object is known as redshift, and when an object is moving towards us, the light from the object is known as blueshift.
Detailed explanation-3: -Blue light has a short wavelength; red light a longer wavelength. The sky looks blue because blue light is scattered far more than red light, owing to the shorter wavelength of blue light. (Violet light, which has an even shorter wavelength, cannot be seen because the human eye is not very sensitive to violet light.)