Once you have detected the possible presence of a black
hole, what data do you need...
Once you have detected the possible presence of a black
hole, what data do you need to prove that it is indeed a black hole
and not a very massive star cluster?
What is the mass of the black hole at the center of our galaxy
if a star orbiting 0.0025 pc away has an orbital period of 7 years?
Be careful of units here.
How massive would a black hole have to be in order for it to
evaporate due to Hawking radiation in only one year? How big is
that mass compared to some object with which you are familiar? (On
the surface of the Earth, 1 kg ? 2.2 lb.)
1. What is the evidence for a black hole at the center of the
Milky Way? How does this compare to stellar size blackholes? How
can these smaller blackholes be observed?
2. What is Hubble’s Law? In what situations does Hubble’s Law
not apply?
3. What is the cosmic microwave background? What is its
origin?
Describe, in detail, what would happen if you fell into
a black hole, from both your perspective, and the perspective of
someone who is watching you fall in. You should include specific
effects, including effects on space, time, and what you would
see.
You are in a spaceship making measurements very close to a black
hole. A partner's spaceship is orbiting the black hole at a much
larger radius. Your partner sends messages to you using visible
light pulses from a laser. When you receive the messages, do you
expect to detect radio waves or gamma waves? Why?
The answer is gamma waves, but I don't understand.
If the Sun were to become a black hole but maintain all of its
mass, what would be its Schwarzschild radius? Given this and the
fact that Earth’s average distance from the Sun is about 150
million km, would the gravity of the black hole pull Earth into it?
Why or why not?