The astrophysicists had always assumed that there are only small sizes of massive size black hole. They had not considered the medium sized black holes. However, recent research has discovered the existence of medium-sized black holes (IMBH) in 2014 the formation of this is due to the fact that several stars collide and form an intermediate black hole in a chain reaction. This could eventually become supermassive black holes (Redd, 2015).
A black hole will not emit any rays and any photons that are sent to detect the black holes will be absorbed by the black hole making it difficult to detect black hole. In order to detect black holes some subsidiary indirect methods are used. Detection of the black bodies by their “gravitational effect on the luminous matter” (Ryden, 2003) is one of the initial attempts done to detect the black holes. Some of the newer methods of detection of the black holes are by using X-Rays, detecting rotating stars or by gravity lenses (Miller, 1996).
The intense gravitational pull of the black hole will cause the nearby particles to heat and that will emit a lot of heat energy and X-Rays. The astronomer’s use this X-Rays to isolate the black holes in the region. Sometimes the star rotates around an area. The astronomers will detect from the rotation of the stars the location of the black holes (Miller, 1996). Another technique to detect the black holes is the use of gravitational lens.