Q. Consider the following statements regarding Black Holes:
A black hole is a supergiant star that has collapsed into itself
The Black-hole singularity has zero radius
Which of the above is / are correct statements?
Answer: Only 1
Notes: Black holes are indeed the remnants of massive stars that have collapsed, but they can also form from the merging of smaller black holes. The singularity is a point in the center of a black hole where the laws of physics as we know them break down, and the density becomes infinite. The singularity is surrounded by the event horizon, which marks the boundary beyond which anything that gets too close is pulled in and cannot escape.
Black hole singularity does not have a physical size or radius. Instead, it is considered to be a point-like object of zero size, or a mathematical singularity, at which the laws of physics break down and the density becomes infinite. The concept of the singularity is still not fully understood, and it remains a subject of active research in physics and astrophysics.
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