Black holes are invisible as they do not emit any light, but their presence can be inferred by observing their effects on nearby matter. The region surrounding a black hole from wh

astrophysics question Black holes are invisible as they do not emit any light, but their presence can be inferred by observing their effects on nearby matter. The region surrounding a black hole from which no light can escape is called the “event horizon.” The event horizon marks the boundary beyond which anything that gets too […]