>> ‘disappears’
It doesn’t disappear. It just becomes thermal radiation.
>>Why is it called a Black HOLE,
Because visible light goes in but does not come out as visible light.
You aren't saying anything. Every 'star' is in the process of becoming thermal radiation. These stars 'disappear' down a HOLE. How much 'thermal radiation' is given off by a black hole vs. the amount of matter and energy that flow into it?
Because visible light goes in but does not come out as visible light.
What does it come out as? Black light?