I would like to know some useful facts about Stephan Hawking.
I would like to know some useful facts about Stephan Hawking.
user
Stephan Hawking is a theoretical physicist and cosmologist.  His work is concerned with theoretical physics.  According to him, theoretical physics is the study of concepts in the absence of experiments.   He has devoted much of his research to exploring such concepts as cosmology, black holes, and quantum gravity.   Hawking’s book A Brief History of Time has been a best-seller.
assistant
When was he born?
user
July 8, 1942
assistant
What are some of his discoveries?
user
In 1973, Hawking was the first to realize that singularities (that is, points where space-time curvature is infinite) may exist in black holes.
assistant
What else did Hawking discover about black holes?
user
Hawking believed black holes are actually not entirely black, and that black holes give off radiation, in the form of Hawking radiation.  Also, he was the first to describe Hawking radiation.
assistant
Can you tell me a little more about Hawking radiation?
user
In 1974, Hawking conjectured that black holes give off radiation.  This radiation was named after him: Hawking radiation.  This radiation is given off as black holes shrink.  The radiation is actually thermal radiation, and is quantum-mechanical in origin.
assistant
Can we feel thermal radiation?
user