GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Redshift
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Emission and absorption spectrums of elements in space
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Cosmic background radiation
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Gravitational waves
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Detailed explanation-1: -About a billion years after the Big Bang, gravity caused these atoms to gather in huge clouds of gas, forming collections of stars known as galaxies. Gravity is the force that pulls any objects with mass towards one another–the same force, for example, that causes a ball thrown in the air to fall to the earth.
Detailed explanation-2: -According to the Big Bang theory, which proposes that the universe is roughly 13.7 billion years old, all matter and energy were at one time compressed into a single microscopic point. This point then exploded outward in all directions in a rapid expansion.
Detailed explanation-3: -The type of waves that might be produced in the early universe are called cosmological gravitational waves and have not yet been detected. Such waves travel freely after being produced; they act like ghosts that can go through the recombination wall and provide a unique tool to investigate the early universe.