Talking of Hawking Radiation and black holes, I need your help,
in explaining to an 8 year old:
What is an event horizon ?
It is a boundary in spacetime.
Beyond this boundary you can no longer escape gravitational pull.
It is the boundary to an area in space which is so dense that no light,
matter can escape it's gravitational field.
Beyond the event horizon you are caught in the gravitational field of a black hole, a super dense area in space.
At the event horizon the escape velocity is the speed of light.
All galaxies have supermassive black holes at their centre.
Don't be frightened of black holes, they sound impressive and they are,
but they are common and there's a supermassive black hole at the center of our galaxy.
(
oh and something does leak from black holes it is called Hawking Radiation lol)
And what happens to a spaceship full of people who crosses the event horizon
and gets caught in the gravitational pull of the black hole ?
Well for one thing, because no light escapes a black hole, we, the observers can no longer see them.
Everything is torn apart.
Spacetime keeps bending as you receded towards the super dense heart of the black hole,
the density tears atoms apart.
They are crushed by the tremendous change of pressure due to the density of the gravitional field?
Oh and actually we don't really know, nobody has ever come back from one ?
??? so who can explain what happens to the spaceship of people spiralling off into
the density of the black hole ?
