Question 1: What is the escape velocity at the event horizon of a black
The speed of light
The speed of sound
Question 2: Black holes can be formed by the gravitational collapse
of which astronomical objects?
Large planets like Jupiter
Stars about the size of our Sun
Stars much heavier than our Sun
Question 3: How do astronomers know when they are observing a black
When they see the light emitted from nearby dust and gas being sucked
into the black hole
When they hear the screams of people falling into the black hole
When everything in that region of space is completely black
Question 4: Which statement below is true as far as the theory of black
holes is concerned?
In classical theory black holes always decay but in quantum theory they
In classical theory black holes always decay and in quantum theory they
decay even faster.
In classical theory black holes never decay but in quantum theory they