Question

Beyond what point must an object be squeezed for it to become a black hole

Answer 1

Condition

`(m)/(R) \geq (c^(2) )/(2*g)`

Step-by-step explanation:

Basically black hole is an object from which light rays can not escape it means to go out from gravitational field , that body should thrown with speed greater then light.

Let's do some calculation

Gravitational potential at surface =
`-(G*M*m)/(R)`

If we give kinetic energy equal to magnitude of Potential energy as on surface it will escape.

`(m*v^(2) )/(2)` =
`-(G*M*m)/(R)`

⇒
`(m)/(R) =(c^(2) )/(2*G)`

It will be more better for black hole if above ratio (analogous to density ) is more then above calculated