Question 1

As a spaceship nears an event horizon, a clock on the spaceship will be observed

Accepted Answer

A)  to run faster. 
B)  to stop. 
C)  to run slowly. 
D)  to run backwards. 
E)  to run the same as one on Earth. 
A)  to run faster. 
B)  to stop. 
C)  to run slowly. 
D)  to run backwards. 
E)  to run the same as one on Earth.

Question 2

What explanation does general relativity provide for gravity?

Accepted Answer

A)  Gravity is the result of curved spacetime. 
B)  Gravity is directly proportional to the mass of the attracting body. 
C)  Gravity is inversely proportion to the radius of the body. 
D)  Gravity is the opposite of the electromagnetic force. 
E)  Gravity can affect only massive particles, not massless photons. 
A)  Gravity is the result of curved spacetime. 
B)  Gravity is directly proportional to the mass of the attracting body. 
C)  Gravity is inversely proportion to the radius of the body. 
D)  Gravity is the opposite of the electromagnetic force. 
E)  Gravity can affect only massive particles, not massless photons.

Question 3

As a spaceship's velocity gets closer to the speed of light

Accepted Answer

A)  its length will increase and its clock will run more slowly. 
B)  its length will decrease and its clock will run faster. 
C)  its length will increase and its clock will run faster. 
D)  its length will decrease and its clock will run more slowly. 
E)  None of these will happen. 
A)  its length will increase and its clock will run more slowly. 
B)  its length will decrease and its clock will run faster. 
C)  its length will increase and its clock will run faster. 
D)  its length will decrease and its clock will run more slowly. 
E)  None of these will happen.

Question 4

The mass range for neutron stars is

Accepted Answer

A)  0.08 to .4 solar masses. 
B)  0.4 to 3 solar masses. 
C)  1.4 to 3 solar masses. 
D)  3 to 8 solar masses. 
E)  6 to 11 solar masses. 
A)  0.08 to .4 solar masses. 
B)  0.4 to 3 solar masses. 
C)  1.4 to 3 solar masses. 
D)  3 to 8 solar masses. 
E)  6 to 11 solar masses.

Question 5

In M82, observations indicate that there are several bright sources close to the center of the galaxy. These might be

Accepted Answer

A)  supernovae. 
B)  accretion disks of supermassive black holes, millions of times as massive as our sun. 
C)  accretion disks of intermediate black holes, hundreds of times as massive as our sun. 
D)  accretion disks of stellar mass black holes. 
E)  red giants in the process of forming planetary nebulae. 
A)  supernovae. 
B)  accretion disks of supermassive black holes, millions of times as massive as our sun. 
C)  accretion disks of intermediate black holes, hundreds of times as massive as our sun. 
D)  accretion disks of stellar mass black holes. 
E)  red giants in the process of forming planetary nebulae.

Question 6

What happens to the light that is emitted from the accretion disk around a black hole?

Accepted Answer

A)  It is redshifted. 
B)  It is blueshifted. 
C)  It is pulled in multiple directions by tides. 
D)  It cannot be seen from anywhere in our solar system. 
E)  It is absorbed by the black hole. 
A)  It is redshifted. 
B)  It is blueshifted. 
C)  It is pulled in multiple directions by tides. 
D)  It cannot be seen from anywhere in our solar system. 
E)  It is absorbed by the black hole.

Question 7

Why would the tidal forces around a black hole be of concern to a space explorer interested in investigating the area near a black hole?

Accepted Answer

The difference in gravity betw

Question 8

General relativity explains gravity as the ________ of spacetime.

Accepted Answer

The answer of General relativity explains gravity as the ________...

Question 9

If light from a distant star passes close to a massive body, the light beam will

Accepted Answer

A)  bend towards the star due to gravity. 
B)  continue moving in a straight line. 
C)  change color to a shorter wavelength. 
D)  slow down. 
E)  accelerate due to gravity. 
A)  bend towards the star due to gravity. 
B)  continue moving in a straight line. 
C)  change color to a shorter wavelength. 
D)  slow down. 
E)  accelerate due to gravity.

Question 10

To explain gravity, general relativity says that matter tends to ________ space in its vicinity.

Accepted Answer

The answer of To explain gravity, general relativity says that...

Question 11

Special relativity says that c, the speed of light, is the maximum velocity for both matter and energy in our universe.

Accepted Answer

A) True 
 B)False

Question 12

An object increases in mass if it is moving rapidly compared to the observer.

Accepted Answer

A) True 
 B)False

Question 13

What can we detect from matter that has crossed an event horizon?

Accepted Answer

A)  Gamma-ray bursts 
B)  Radio waves if the matter was traveling fast enough 
C)  Visible light 
D)  X-rays if the matter was dense 
E)  Nothing 
A)  Gamma-ray bursts 
B)  Radio waves if the matter was traveling fast enough 
C)  Visible light 
D)  X-rays if the matter was dense 
E)  Nothing

Question 14

How are the event horizon and Schwarzschild radius related?

Accepted Answer

A)  The Schwarzschild radius is smaller than the distance from the singularity of a black hole to the event horizon. 
B)  The Schwarzschild radius is equal to the distance from the singularity of a black hole to the event horizon. 
C)  The Schwarzschild radius is greater than the distance from the singularity of a black hole to the event horizon. 
D)  The size of the Schwarzschild radius is unrelated to the distance from the singularity of a black hole to the event horizon. 
E)  The size of the Schwarzschild radius is proportional to the distance from the singularity of a black hole to the event horizon. 
A)  The Schwarzschild radius is smaller than the distance from the singularity of a black hole to the event horizon. 
B)  The Schwarzschild radius is equal to the distance from the singularity of a black hole to the event horizon. 
C)  The Schwarzschild radius is greater than the distance from the singularity of a black hole to the event horizon. 
D)  The size of the Schwarzschild radius is unrelated to the distance from the singularity of a black hole to the event horizon. 
E)  The size of the Schwarzschild radius is proportional to the distance from the singularity of a black hole to the event horizon.

Question 15

What happens to the size and mass of an object as it moves faster?

Accepted Answer

A faster object's ma

Question 16

The singularity of a black hole is where general relativity predicts the density to become infinite.

Accepted Answer

A) True 
 B)False

Question 17

Light from an object near the event horizon received by a distant observer is ________.

Accepted Answer

The answer of Light from an object near the event...

Question 18

Einstein received the Nobel Prize in physics for his work with general relativity.

Accepted Answer

A) True 
 B)False

Question 19

Special relativity predicts that light bends near dense objects.

Accepted Answer

A) True 
 B)False

Question 20

The Schwarzschild radius of a black hole is about 3 km per solar mass; it is amazingly linear over a wide range of masses.

Accepted Answer

A) True 
 B)False

As a spaceship nears an event horizon, a clock on the spaceship will be observed

What explanation does general relativity provide for gravity?

As a spaceship's velocity gets closer to the speed of light

The mass range for neutron stars is

In M82, observations indicate that there are several bright sources close to the center of the galaxy. These might be

What happens to the light that is emitted from the accretion disk around a black hole?

Why would the tidal forces around a black hole be of concern to a space explorer interested in investigating the area near a black hole?

General relativity explains gravity as the ________ of spacetime.

If light from a distant star passes close to a massive body, the light beam will

To explain gravity, general relativity says that matter tends to ________ space in its vicinity.

Special relativity says that c, the speed of light, is the maximum velocity for both matter and energy in our universe.

An object increases in mass if it is moving rapidly compared to the observer.

What can we detect from matter that has crossed an event horizon?

How are the event horizon and Schwarzschild radius related?

What happens to the size and mass of an object as it moves faster?

The singularity of a black hole is where general relativity predicts the density to become infinite.

Light from an object near the event horizon received by a distant observer is ________.

Einstein received the Nobel Prize in physics for his work with general relativity.

Special relativity predicts that light bends near dense objects.

The Schwarzschild radius of a black hole is about 3 km per solar mass; it is amazingly linear over a wide range of masses.

The Night Sky

Light and Telescopes

The Solar System

Earth and Its Moon

The Eight Planets

Small Bodies in the Solar System

Formation of Planetary Systems

The Sun

Measuring the Stars

Star Formation and Evolution

Stellar Explosions

The Milky Way Galaxy

Galaxies

Cosmology and the Universe

Filters

Exam 12: Black Holes

As a spaceship nears an event horizon, a clock on the spaceship will be observed

What explanation does general relativity provide for gravity?

As a spaceship's velocity gets closer to the speed of light

The mass range for neutron stars is

In M82, observations indicate that there are several bright sources close to the center of the galaxy. These might be

What happens to the light that is emitted from the accretion disk around a black hole?

Why would the tidal forces around a black hole be of concern to a space explorer interested in investigating the area near a black hole?

General relativity explains gravity as the ________ of spacetime.

If light from a distant star passes close to a massive body, the light beam will

To explain gravity, general relativity says that matter tends to ________ space in its vicinity.

Special relativity says that c, the speed of light, is the maximum velocity for both matter and energy in our universe.

An object increases in mass if it is moving rapidly compared to the observer.

What can we detect from matter that has crossed an event horizon?

How are the event horizon and Schwarzschild radius related?

What happens to the size and mass of an object as it moves faster?

The singularity of a black hole is where general relativity predicts the density to become infinite.

Light from an object near the event horizon received by a distant observer is ________.

Einstein received the Nobel Prize in physics for his work with general relativity.

Special relativity predicts that light bends near dense objects.

The Schwarzschild radius of a black hole is about 3 km per solar mass; it is amazingly linear over a wide range of masses.

The Night Sky

Light and Telescopes

The Solar System

Earth and Its Moon

The Eight Planets

Small Bodies in the Solar System

Formation of Planetary Systems

The Sun

Measuring the Stars

Star Formation and Evolution

Stellar Explosions

The Milky Way Galaxy

Galaxies

Cosmology and the Universe

Filters