Question 1

Suppose a blinking light source uniformly accelerates away from you.As the source gets farther and farther away,you'll notice that the frequency of the flashes

Accepted Answer

A) increases. 
B) decreases. 
C) neither increases nor decreases. 
A) increases. 
B) decreases. 
C) neither increases nor decreases. B

Question 2

The ether theory of light propagation is

Accepted Answer

A) much used. 
B) incomplete,but still useful. 
C) unexplained. 
D) discredited. 
A) much used. 
B) incomplete,but still useful. 
C) unexplained. 
D) discredited. D

Question 3

According to Einstein's theory of special relativity

Accepted Answer

A) space and time are aspects of each other. 
B) energy and mass are aspects of each other. 
C) both of these 
D) none of these 
A) space and time are aspects of each other. 
B) energy and mass are aspects of each other. 
C) both of these 
D) none of these C

Question 4

In some reference frame in the universe,you,right now,may be traveling at a speed that is

Accepted Answer

A) faster than the speed of light. 
B) slower than the speed of light. 
C) at the speed of light. 
D) None of the above choices are correct. 
A) faster than the speed of light. 
B) slower than the speed of light. 
C) at the speed of light. 
D) None of the above choices are correct.

Question 5

Radioactive muons formed high in the atmosphere have an average lifetime of 2 millionths of a second and travel toward Earth at nearly the speed of light.They are so high they should have decayed by the time they reach the Earth's surface,according to pre-relativity physics.They don't because they

Accepted Answer

A) live longer due to time dilation. 
B) travel a shorter distance due to length contraction. 
C) either of these 
D) neither of these 
A) live longer due to time dilation. 
B) travel a shorter distance due to length contraction. 
C) either of these 
D) neither of these

Question 6

If a 1-microgram antimatter meteor were to strike the Earth,the amount of energy of forms other than mass that would be produced would be

Accepted Answer

A) 18 joules. 
B) 18 thousand joules. 
C) 18 million joules. 
D) 18 billion joules. 
E) 180 billion joules. 
A) 18 joules. 
B) 18 thousand joules. 
C) 18 million joules. 
D) 18 billion joules. 
E) 180 billion joules.

Question 7

According to the well-known equation,energy equals mass times the speed of light squared

Accepted Answer

A) mass and energy travel at the speed of light squared. 
B) energy is actually mass traveling at the speed of light squared. 
C) mass and energy travel at twice the speed of light. 
D) mass and energy are related. 
E) none of these 
A) mass and energy travel at the speed of light squared. 
B) energy is actually mass traveling at the speed of light squared. 
C) mass and energy travel at twice the speed of light. 
D) mass and energy are related. 
E) none of these

Question 8

The frequency of a blinking light source appears to double as the light source approaches you.As the same light source moves away from you at the same speed,its frequency

Accepted Answer

A) is halved. 
B) is doubled. 
C) stays the same. 
A) is halved. 
B) is doubled. 
C) stays the same.

Question 9

According to the special theory of relativity,events that are simultaneous in one frame of reference

Accepted Answer

A) are simultaneous in all frames of reference. 
B) are not simultaneous in other frames of reference. 
C) may or may not be simultaneous in other frames of reference. 
A) are simultaneous in all frames of reference. 
B) are not simultaneous in other frames of reference. 
C) may or may not be simultaneous in other frames of reference.

Question 10

When a blinking light source moves relative to you,the speed of the light

Accepted Answer

A) changes but its frequency remains constant. 
B) remains constant but its frequency can change. 
C) stays the same,as does its frequency. 
A) changes but its frequency remains constant. 
B) remains constant but its frequency can change. 
C) stays the same,as does its frequency.

Question 11

As you approach a blinking light source,the frequency you observe

Accepted Answer

A) increases. 
B) decreases. 
C) stays the same, 
A) increases. 
B) decreases. 
C) stays the same,

Question 12

Clocks on a spaceship moving very fast relative to the Earth run more slowly when viewed from

Accepted Answer

A) the spaceship. 
B) the Earth. 
C) both places. 
D) neither place. 
A) the spaceship. 
B) the Earth. 
C) both places. 
D) neither place.

Question 13

To outside observers,the overall sizes of objects traveling at relativistic speeds are

Accepted Answer

A) larger. 
B) smaller. 
C) the same size. 
A) larger. 
B) smaller. 
C) the same size.

Question 14

According to relativity theory,if a space trip finds a son or daughter biologically older than his or her parents,then the space trip is taken by the

Accepted Answer

A) son or daughter. 
B) parents. 
C) either 
D) Neither,it can't be done. 
A) son or daughter. 
B) parents. 
C) either 
D) Neither,it can't be done.

Question 15

Objects accelerated to relativistic speeds

Accepted Answer

A) live shorter. 
B) grow bigger. 
C) both of these 
D) neither of these 
A) live shorter. 
B) grow bigger. 
C) both of these 
D) neither of these

Question 16

Consider a planet at rest and a spaceship that whizzes past the planet at high speed.An observer on the planet sees a contracted spaceship,while an observer on the spaceship sees

Accepted Answer

A) a contracted planet. 
B) an expanded planet. 
C) a normal planet. 
D) could be contracted or expanded depending on the direction of travel 
A) a contracted planet. 
B) an expanded planet. 
C) a normal planet. 
D) could be contracted or expanded depending on the direction of travel

Question 17

The length of a meterstick projected like a spear at 0.87c is seen by a person at rest to be

Accepted Answer

A) 0)5 m. 
B) 0)87 m. 
C) 1 m. 
D) 1)25 m. 
E) 1)5 m. 
A) 0)5 m. 
B) 0)87 m. 
C) 1 m. 
D) 1)25 m. 
E) 1)5 m.

Question 18

According to special relativity,one can travel at increased rates

Accepted Answer

A) both forward and backward in time. 
B) backward in time. 
C) only forward in time. 
A) both forward and backward in time. 
B) backward in time. 
C) only forward in time.

Question 19

As you approach a light source,the wavelength of the emitted light appears

Accepted Answer

A) longer. 
B) shorter. 
C) the same. 
A) longer. 
B) shorter. 
C) the same.

Question 20

As you recede from a blinking light source,the frequency of its blinking that you observe

Accepted Answer

A) increases. 
B) decreases. 
C) stays the same. 
A) increases. 
B) decreases. 
C) stays the same.

Exam 35: Special Theory of Relativity

Suppose a blinking light source uniformly accelerates away from you.As the source gets farther and farther away,you'll notice that the frequency of the flashes

The ether theory of light propagation is

According to Einstein's theory of special relativity

In some reference frame in the universe,you,right now,may be traveling at a speed that is

Radioactive muons formed high in the atmosphere have an average lifetime of 2 millionths of a second and travel toward Earth at nearly the speed of light.They are so high they should have decayed by the time they reach the Earth's surface,according to pre-relativity physics.They don't because they

If a 1-microgram antimatter meteor were to strike the Earth,the amount of energy of forms other than mass that would be produced would be

According to the well-known equation,energy equals mass times the speed of light squared

The frequency of a blinking light source appears to double as the light source approaches you.As the same light source moves away from you at the same speed,its frequency

According to the special theory of relativity,events that are simultaneous in one frame of reference

When a blinking light source moves relative to you,the speed of the light

As you approach a blinking light source,the frequency you observe

Clocks on a spaceship moving very fast relative to the Earth run more slowly when viewed from

To outside observers,the overall sizes of objects traveling at relativistic speeds are

According to relativity theory,if a space trip finds a son or daughter biologically older than his or her parents,then the space trip is taken by the

Objects accelerated to relativistic speeds

Consider a planet at rest and a spaceship that whizzes past the planet at high speed.An observer on the planet sees a contracted spaceship,while an observer on the spaceship sees

The length of a meterstick projected like a spear at 0.87c is seen by a person at rest to be

According to special relativity,one can travel at increased rates

As you approach a light source,the wavelength of the emitted light appears

As you recede from a blinking light source,the frequency of its blinking that you observe

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