The event horizon of a black hole marks the boundary where t

The event horizon of a black hole marks the boundary where the escape velocity reaches the speed of light. Calculate the Schwarzschild radius for the event horizon of a 8.30 M Solar black hole. Answer in km.

Solution

Schwarzschild radius is calculated as follows:

     R = 2GM/c^2

        = 2*6.67x10^-11*8.3*2x10³⁰ /(3x10^8)^2

        = 24.6x10³ m

        = 24.6 km