What are black holes? How are they formed? Let's see.
Black holes are specific regions in spacetime with extremely intense gravitational field that doesn't let any particle and even electromagnetic radiations like light to escape. And because light gets pulled into the black hole they appear black.
Black holes are formed when big stars collapses. As the star ages, it finishes up its fuel leaving extremely heavy elements in its core. As the core gets heavier and heavier, it eventually becomes so heavy that it collapses under its own gravitational pull. While this happens it releases lot of energy and mass into space in the form of an explosion we call Supernova explosion. As time passes the core sucks in more mass and then its gravitational pull becomes so strong that it even sucks in light and spacetime. We call this core and surrounding space as black hole.
A black hole has two parts, one which we can see-the region surrounding the black hole consisting of hot gases and dust which came from the stars and planets it sucked in. The other part is the one which we can't see- the inner core where gravity doesn't let even light to escape. These two parts are separated by a fictitious wall called Event Horizon.
Let's think we throw some object with a clock and camera fitted in it towards a black hole and somehow it communicates with us all the time. As the object approaches the black hole the gravitational pull on it keeps on increasing. Moreover as it goes near the event horizon the difference in the gravitational pull between the front and back faces of the object increases which gives more acceleration to the front face than the rear one which cause it to elongate. Gravitational pull of black hole is so strong that the object elongates to form a extremely long and thin string type thing. This phenomenon is known as the 'spaghetti effect'.
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We assume that still the object communicates with us. One more thing that happens as it nears the event horizon is that the black hole warps spacetime around itself which causes huge time dilation. Why this is caused? Because the light emitted by the object find it tougher and tougher to cross the gravitational pull. The clock inside the object starts ticking slowly. And as soon it reaches the Event horizon time almost stops. We will see that the object suddenly stops there and stays there forever. We know that electromagnetic radiations can't escape black holes but we assume that somehow the object is communicating with us in realtime. As the object crosses the event horizon suddenly we can see all the light that is being pulled inside. This is a big peculiarity that the light inside black hole maybe a few billion years old. We can see our universe evolving from the past in front of us. Eventually we will fall in the center called the singularity which occupies only an infinitely small space. At singularity the density tends infinity and with so much of gravitational pull at this point many laws of physics breaks down. Our human imagination stops working at understanding the point of singularity.
Black holes are formed when big stars collapses. As the star ages, it finishes up its fuel leaving extremely heavy elements in its core. As the core gets heavier and heavier, it eventually becomes so heavy that it collapses under its own gravitational pull. While this happens it releases lot of energy and mass into space in the form of an explosion we call Supernova explosion. As time passes the core sucks in more mass and then its gravitational pull becomes so strong that it even sucks in light and spacetime. We call this core and surrounding space as black hole.
A black hole has two parts, one which we can see-the region surrounding the black hole consisting of hot gases and dust which came from the stars and planets it sucked in. The other part is the one which we can't see- the inner core where gravity doesn't let even light to escape. These two parts are separated by a fictitious wall called Event Horizon.
Let's think we throw some object with a clock and camera fitted in it towards a black hole and somehow it communicates with us all the time. As the object approaches the black hole the gravitational pull on it keeps on increasing. Moreover as it goes near the event horizon the difference in the gravitational pull between the front and back faces of the object increases which gives more acceleration to the front face than the rear one which cause it to elongate. Gravitational pull of black hole is so strong that the object elongates to form a extremely long and thin string type thing. This phenomenon is known as the 'spaghetti effect'.
We assume that still the object communicates with us. One more thing that happens as it nears the event horizon is that the black hole warps spacetime around itself which causes huge time dilation. Why this is caused? Because the light emitted by the object find it tougher and tougher to cross the gravitational pull. The clock inside the object starts ticking slowly. And as soon it reaches the Event horizon time almost stops. We will see that the object suddenly stops there and stays there forever. We know that electromagnetic radiations can't escape black holes but we assume that somehow the object is communicating with us in realtime. As the object crosses the event horizon suddenly we can see all the light that is being pulled inside. This is a big peculiarity that the light inside black hole maybe a few billion years old. We can see our universe evolving from the past in front of us. Eventually we will fall in the center called the singularity which occupies only an infinitely small space. At singularity the density tends infinity and with so much of gravitational pull at this point many laws of physics breaks down. Our human imagination stops working at understanding the point of singularity.
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