GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Suppose the light spectrum from a distant star shifted toward the blue end of the light spectrum. What would this imply?
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The star is moving away from us
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The star is moving toward us
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The star is not moving relative to us
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None of the above
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Explanation:
Detailed explanation-1: -When the spectral lines of a moving star shift toward the red end of the spectrum, we know that the star is moving away from us. If they shift toward the blue end, the star is moving toward us.
Detailed explanation-2: -Which of the following is true about objects that we observe at varying distances from us? The farther from us we look in the universe, the further we look back in time.
Detailed explanation-3: -What does Hubble’s law imply about the history of the universe? the universe had a beginning and has expanded since, giving it a finite age. Astronomers know the universe is expanding because: galaxies farther away are moving away from us faster.
There is 1 question to complete.