GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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low level microwave energy
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extreme heat
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a swirling vortex
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visible light
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Detailed explanation-1: -Because the Universe has been expanding this entire time, the wavelength of that initially hot light has gotten stretched, all the way from gamma rays through visible light and into the microwave portion of the spectrum. This leftover glow from the Big Bang shows up today as the Cosmic Microwave Background, or CMB.
Detailed explanation-2: -Simply put, it says the universe as we know it started with an infinitely hot and dense single point that inflated and stretched-first at unimaginable speeds, and then at a more measurable rate-over the next 13.7 billion years to the still-expanding cosmos that we know today.
Detailed explanation-3: -This theory proposes that the universe is eternal and had no beginning and will have no end. It is expanding, but at a very uniform or steady rate that looks the same on a large scale. But if the universe was expanding, then the density of the universe must decrease.