Chapter 10

Ryan Tram
Quiz by Ryan Tram, updated more than 1 year ago
Ryan Tram
Created by Ryan Tram over 3 years ago
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Astronomy
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Resource summary

Question 1

Question
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.)
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