GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Originally Gamma rays, but shifted to become X-rays
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Originally low energy, but heated up when it hit the Earth
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Originally radio waves, but shifted into microwaves
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Originally high energy, but cooled down as the universe grew
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Detailed explanation-1: -The cosmic microwave background (CMB) is leftover radiation from the Big Bang or the time when the universe began. As the theory goes, when the universe was born it underwent rapid inflation, expansion and cooling.
Detailed explanation-2: -Quickly after the recombination epoch, the rapid expansion of the universe caused the plasma to cool down and these fluctuations are “frozen into” the CMB maps we observe today.
Detailed explanation-3: -The Big Bang theory predicts that the early universe was a very hot place and that as it expands, the gas within it cools. Thus the universe should be filled with radiation that is literally the remnant heat left over from the Big Bang, called the “cosmic microwave background", or CMB.