GK
THE UNIVERSE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
Galaxy
|
|
Sun
|
|
Quasar
|
|
Black Hole
|
Detailed explanation-1: -A black hole is a region of spacetime where gravity is so strong that nothing, including light or other electromagnetic waves, has enough energy to escape its event horizon. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
Detailed explanation-2: -As such, gravity doesn’t escape from within the interior of the black hole: it’s simply caused by the hole’s presence. If black holes collide, however, the space-time surrounding them responds by producing ripples known as gravitational waves; but again they aren’t ‘escaping’ from within the black holes.
Detailed explanation-3: -Black holes are regions in space where an enormous amount of mass is packed into a tiny volume. This creates a gravitational pull so strong that not even light can escape. They are created when giant stars collapse, and perhaps by other methods that are still unknown.
Detailed explanation-4: -The reason nothing can escape a black hole is that, within the event horizon, space is curved to the point where all directions are actually pointing inside. The event horizon of a black hole is where gravity is such that not even light can escape.