NEET2014Physics-Gravitation

NEET 2014 Physics Black Holes MCQ Question

Type: MCQ-numerical-Hard-Class 11

A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass = 5.98 × 10²⁴ kg) have to be compressed to be a black hole?

A

10⁻⁹ m

B

10⁻⁶ m

C

10⁻² m

D

100 m

Correct Answer

Option C

Detailed Explanation

The Schwarzschild radius Rₛ = 2GM/c². Substituting the values for Earth, Rₛ ≈ 8.87 mm, which is approximately 10⁻² m.

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