GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following happens before a black hole comes into existence?
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Gravity ceases to exist in a certain region of space
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A new star is born at the center of a galaxy
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An old star collapses in on itself
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The fabric of spacetime is ripped by a star or planet
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Explanation:
Detailed explanation-1: -According to theory, a black hole arises when a giant star runs out of fuel for thermonuclear fusion. The star’s core collapses, igniting a shock wave that blasts the rest of the star into space. If the collapsing core is a few times the mass of our sun, gravity will crush it into an infinitely dense speck.
Detailed explanation-2: -This collapse produces the explosion we call a supernova. Supernovae are so powerful they create new atomic nuclei. As a massive star collapses, it produces a shockwave that can induce fusion reactions in the star’s outer shell. These fusion reactions create new atomic nuclei in a process called nucleosynthesis.
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