What makes us think that the star system Cygnus X-1 contains a black hole? A) It is the place where X rays are emitted from black holes.B) It is the very center of the black hole.C) It is the point beyond which neither light nor anything else can escape.D) It is the distance from the black hole at which stable orbits are possible.

The equation for the Schwarzschild radius is: Rs= 2GM c2 G is the gravitational constant, 6:67 1011m3=s2=kg, M is the mass of the black hole, and c is the speed of light. It is the center of the black hole. D. Astronomers have detected X rays from accretion disks around black holes.

(a) A supermassive black hole with 1 108 times the Sun’s mass that is in the center of a quasar. It is the very center of the black hole. Depends on how you move and measure. What do we mean by the event horizon of a black hole? An object whose entire mass M lies within r s is considered to be a black hole. The ‘event horizon’ is the boundary defining the region of space around a black hole from which nothing (not even light) can escape.In other words, the escape velocity for an object within the event horizon exceeds the speed of light.The name arises since it is impossible to observe any event taking place inside it – it is a horizon beyond which we cannot see. What do we mean by the event horizon of a black hole? What do we mean by the event horizon of a black hole? What do we mean by the event horizon of a black hole? E. We don't know for sure: we only know what to expect based on … Event horizon is the name given to r s, because from that radius the escape velocity from the black hole's gravity is the speed of light. Think of the black hole like a hole at the bottom of a steeply sloping valley: the steep ground outside the hole is the space just outside the event horizon. Black holes draw mass in through gravitational forces, but none of that mass can ever escape. In a sense, it … It is the boundary within which events in the black hole cannot influence events in … Imagine that our Sun were magically and suddenly replaced by a black hole of the same mass (1 solar mass). As the eminent American physicist Kip Thorne describes it, it is "the point where all laws of physics break down". Do you know what a “light cone” means? What do we mean by the event horizon of a black hole?

It is the point beyond which neither light nor anything else can escape. It is the "bottomless pit" of the black hole. Start studying Mastering Astronomy Chapter 13 + 14. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The ‘event horizon’ is the boundary defining the region of space around a black hole from which nothing (not even light) can escape.In other words, the escape velocity for an object within the event horizon exceeds the speed of light.The name arises since it is impossible to observe any event taking place inside it – it is a horizon beyond which we cannot see. What do we mean by the event horizon of a black hole? A. Camille M. Carlisle Post Author. The light that's reddening is coming from the person *before* they pass the event horizon. It is the point beyond which neither light nor anything else can escape.

Black holes warp space and time to such an extreme that inside the black hole's horizon, space and time actually swap roles. June 26, 2017 at 3:12 pm. C. Astronomers have analyzed the light from matter within the event horizon of many black holes. In the center of a black hole is a gravitational singularity, a one-dimensional point which contains a huge mass in an infinitely small space, where density and gravity become infinite and space-time curves infinitely, and where the laws of physics as we know them cease to operate. It is the place where X rays are emitted from black holes It is the point beyond which neither light nor anything else can escape.