GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is recessional velocity
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Red-shift
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Hubble time
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The relative distance to the galaxy
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Speed (in a direction) that galaxies are moving away
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Explanation:
Detailed explanation-1: -Hubble’s Law is the relation between the recession velocity of a galaxy and its distance: Vr = H d, that is, the velocity of recession Vr equals the distance d times the Hubble constant H.
Detailed explanation-2: -This means that a galaxy 1 megaparsec away will be moving away from us at a speed of about 70 km/sec, while another galaxy 100 megaparsecs away will be receding at 100 times this speed. So essentially, the Hubble constant sets the rate at which the Universe is expanding.
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