Question

Black holes cannot be observed directly, because they emit no light. However, a scientist can hunt for black holes because

	a.	black holes can gravitationally influence the orbits of nearby stars, and those stars can be observed.
	b.	a black hole can still emit electrons.
	c.	a black hole will reflect light.
	d.	magnetic fields cause an emanation of thermal energy in the form of high-speed protons.

Answer 1

Black holes cannot be observed directly, because they emit no light. However, a scientist can hunt for black holes because black holes can gravitationally influence the orbits of nearby stars, and those stars can be observed b a black hole can still emit electrons a black hole will reflect light. d magnetic fields cause an emanation of thermal energy in the form of high-speed protons Most of the physicist considers a black hole to be region in space with enormous gravitational pull that cause very fast star rotation around them (in close orbits) This fast and close orbiting of the stars is experimentally verified.