GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which phenomenon was observed by Edwin Hubble that was used to explain the expansion of the universe.
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Conservation of momentum
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Redshift
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Photons
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Gravitational pull
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Explanation:
Detailed explanation-1: -Hubble’s brilliant observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth. That meant that things farther away from Earth were moving away faster. In other words, the universe must be expanding.
Detailed explanation-2: -Since all the galaxies are moving away from us, then they must all be moving away from each other. This is explained if the Universe, as a whole, is expanding. In a real sense, Hubble’s law, the recession velocity of galaxies, is an illusion. The galaxies are not moving, the space between them is literally expanded.
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