A Black Hole has mass MBH = 15 MSolar. What is its Schwarzschild radius?
Answer
50.5 km
44.24 km
76 km
100 km
Question 2
Question
A Black Hole has mass MBH = 1800MSolar. What is its Schwarzschild radius?
Answer
150.5 km
444.24 km
5309.32 km
8769.60 km
Question 3
Question
If the Schwarzschild radius of a Black Hole is 10 km, what is its mass?
Answer
15 Msolar
6.8 Msolar
35 Msolar
48 Msolar
Question 4
Question
Why black holes are black?
Answer
Because they do not have any energy
Because nothing escapes
Because radiation does not escape
Because light does not escape
Question 5
Question
What is at the center of a black hole?
Answer
Another black hole
A little galaxy
The singularity point
An X-ray source
Question 6
Question
What is a supermassive black hole?
Answer
Black hole with mass similar to the sun
Black hole with mass similar to Jupiter
Black hole with mass similar to 3Msolar
Black hole with mass (thousand - billion) Msolar
Question 7
Question
How did the Black Holes were predicted?
Answer
By observation
With radio telescopes
With optical telescopes
Mathematically using Einstein’s general relativity theory
Question 8
Question
Hawking radiation is black body radiation due to
Answer
Electromagnetic effects
Quantum effects
Gravity effects
Mechanical effects
Question 9
Question
Where is the Hawking radiation emitted?
Answer
Near the singularity
Near the horizon
Near the Schwarzschild radius
From particles orbiting the black hole
Question 10
Question
Two Black Holes have the following masses M1 = 100 Msolar and M2 = 40 Msolar . Show that Schwarzschild radius of the first black hole satisfies one of the relations given below. (Do not panic this is a really easy question!!. Hint: All you need is the relation that gives the Schwarzschild radius of a black hole. Look at the lecture slides.)