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)
(G = gravitational constant and g = acceleration due to gravity)
Options
A.(2Gm / r)1/2 ≤ c
B.(2gm / r)1/2 < c
C.(2Gm / r)1/2 ≥ c
D.(gm / r)1/2 ≥ c
More Gravitation Questions
A tunnel is dug along a chord of the Earth at a perpendicular distance R/2 form the Earth′s centre. The wall of th...The escape velocity from the earth is 11.2 km/sec. The escape velocity from a planthaving twice the radius and the same ...Weight of a body of mass m decreases by 1% when it is raised to height h above the Earth′s surface. If the body is...The angular speed of earth in rads/s, so that bodies on equator may apper weightless is : [Use g = 10m/ s2 and the radiu...A particle is projected from point A, that is at a distance 4R from the centre of the Earth, with speed v1 in a directio...