GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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3000K
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3K
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10^10K
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10^28K
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Detailed explanation-1: -After about 300, 000 years the universe cooled off to a chilly 3, 000 Kelvin-colder than the surface of the Sun, but still hotter than any modern-day blast furnace-allowing the electrons to team up with protons and make the universe’s first atoms.
Detailed explanation-2: -After another 324, 000 years, the universe had expanded enough to cool down to 3, 000 degrees Kelvin (2, 727 degrees Celsius, 4, 940 degrees Fahrenheit). Finally, protons and electrons could combine to form neutral hydrogen atoms.
Detailed explanation-3: -In contrast, cosmologists believe the Big Bang flung energy in all directions at the speed of light (300, 000, 000 meters per second, a million times faster than the H-bomb) and estimate that the temperature of the entire universe was 1000 trillion degrees Celsius at just a tiny fraction of a second after the explosion.