GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Red Shift
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Green Shift
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Orange Shift
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Blue Shift
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Detailed explanation-1: -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-2: -Blue light has a shorter wavelength and means the object is moving nearer to us. These objects are said to show a blueshift. The majority of galaxies show a redshift meaning they are moving away from us and each other. There are some galaxies that have a small blueshift, meaning they are moving towards us.
Detailed explanation-3: -When these spectra are examined, they are found to be shifted toward the red end of the spectrum. This shift is apparently a Doppler shift and indicates that essentially all of the galaxies are moving away from us.