Supernova refer to the explosion of a massive star. The material in the central case of such a star continues to collapse under its own gravitational pull. If mass of the core is less is than `1.4` times the mass of sun, its collapse finally results in a white dwarf star. However, if the core has a mass greater than this, it could end up soon as a neutron. star and if its mass is more than about three solar masses, the collapse may still continue till the star becomes a very small object with an extremely high value of density called a 'Black hole'. Escape speed for a black hole is very large. The figure shows a block hole of radius R and another concentric sphere of radius `R_(S)`, called the 'Schwarzschild Radius'. It is the critical radius at which escape speed equals the speed of light c. Nothing even the light, can escape from within the sphere of Radius `R_(S)`. So light from a black hole can not escape and hence the terminology 'black hole'. There has been astronomical evidence of a small and massive object at the centre of our galaxy the 'Milky way'. Suppose that there is a particle at a distance about `6` light years. that orbits this massive object with an orbital speed of about `2 xx 10^(5) m//s`. Use the given data whereever necessary and answer the questions that hollow. `G = 6.67 xx 10^(-11) N - m^(2)//kg^(2)`, Solar mass `M = 2 xx 10^(30) kg, C = 3 xx 10^(8) m//s, 1` light year `= 9.5 xx 10^(15) m`.

Theories suggest that it is not possible for a single star to have a mass of more than `50` masses. The massive object at the centre of milky way galaxy is most likely to be a :

Options

A. white dwarf
B. neutron star
C. black hole
D. single ordinary star

Answer

C