GravitationHard
Question
The condition for a uniform spherical mass m of radius r to be a black hole is :[G =gravitational constant and g = acceleration due to gravity]
Options
A.
B.
C.
D.
Solution
A black hole does not allow light to escape its surface. In other words for a blackbody escape velocity becomes ≥ velocity of light
Now for a body of mass m,
Escape velocity =
So, =
Now for a body of mass m,
Escape velocity =
So, =
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