GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The light from most distant galaxies is ____
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always infrared
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shifted toward the red end of the spectrum
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always ultraviolet
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shifted towards the blue end of the spectrum
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Explanation:
Detailed explanation-1: -Ever since 1929, when Edwin Hubble discovered that the Universe is expanding, we have known that most other galaxies are moving away from us. Light from these galaxies is shifted to longer (and this means redder) wavelengths-in other words, it is ‘red-shifted’.
Detailed explanation-2: -"This phenomenon was observed as a redshift of a galaxy’s spectrum, ‘’ NASA wrote. “This redshift appeared to be larger for faint, presumably further, galaxies. Hence, the farther a galaxy, the faster it is receding from Earth.” The galaxies are moving away from Earth because the fabric of space itself is expanding.
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