GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Astronomers have observed that light emitted by stars in the universe is shifted towards the longer wavelengths of the visible light spectrum. This evidence supports the Big Bang Theory because it suggests that the stars are-
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converting helium gas into hydrogen in their cores.
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moving away from Earth and each other.
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nearing the end of their life cycles.
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spinning rapidly and emitting pulsing flashes of light.
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Explanation:
Detailed explanation-1: -The faster a star moves towards the earth, the more its light is shifted to higher frequencies. In contrast, if a star is moving away from the earth, its light is shifted to lower frequencies on the color spectrum (towards the orange/red/infrared/microwave/radio end of the spectrum).
Detailed explanation-2: -Doppler Red-Shift Evidence The Doppler red-shift of light observed from distant stars and galaxies gives evidence that the universe is expanding (moving away from a central point). This allows for Big Bang Theory, because after a “bang” occurs all of the matter moves away from the point of origin.
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