GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It shows that the universe is expanding (spreading apart)
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It shows that light waves are changing wavelength
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It shows that frequency and energy are NOT interdependent
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It shows that the universe is made up of mostly hydrogen
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Detailed explanation-1: -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.
Detailed explanation-2: -Cosmological Redshift Hubble’s Law of cosmological expansion was first formulated by Edwin Hubble in 1929. Hubble compared the distances to galaxies to their redshift and found a linear relationship. He interpreted the redshift as being caused by the receding velocity of the galaxies.
Detailed explanation-3: -Blue wave lengths are shorter than average wavelengths of visible light. What Hubble observed is that the universe has an overall red shift in visible light. This means that the universe is expanding moving away from the observers. It is this observation of the red shift that gave rise to the theory of the Big Bang.