Quiz about Special Relativity

Question 1

In time dilation, time is

Accepted Answer

relative

Answer

fixed

Answer

constant

Answer

light

Question 2

The speed of light is in all frames of reference, regardless of their motion.

Accepted Answer

constant

Answer

relative

Answer

changes

Answer

varied

Question 3

Which of the following is true about time when an object approaches the speed of light?

Accepted Answer

Time slows down

Answer

Time speeds up

Answer

Time stays the same

Answer

Time will stop

Question 4

Mark and James are both 16 years old. James became an explorer astronaut and travelled at light speed.

According to time dilation, which of the two will be younger after 7 years?

Accepted Answer

James

Answer

Mark

Answer

Both boys will be of the same age

Answer

Both boys will be 7 years old.

Question 5

According to special relativity, what happens to time as you approach the speed of light?

Accepted Answer

Time slows down

Answer

Time speeds up

Answer

Time remains constant

Answer

Time reverses

Question 6

What does the term "relativistic mass" refer to?

Accepted Answer

The increase in mass of an object as its speed approaches the speed of light

Answer

The mass of an object as measured by an observer moving at the same velocity as the object

Answer

The mass of an object as measured in a gravitational field

Answer

The mass of an object in its rest frame

Question 7

The speed of light is

Accepted Answer

300,000 km/s

Answer

30,000 km/s

Answer

30,000 mi/ s

Answer

300,000 m/s

Question 8

Whose theory of relativity is tested by Black Holes?

Accepted Answer

Albert Einstein

Answer

Stephen Hawking

Answer

Plato

Answer

Galileo

Question 9

The phenomenon when "an object approaches the speed of light, it contracts" is known as

Accepted Answer

Length contraction

Answer

Time dilation

Answer

Space-time

Answer

Relativity

Question 10

What happens to time when an object travels at the speed of light?

Accepted Answer

Time stops

Answer

Time slows down

Answer

Time speeds up

Answer

Time stays the same

Question 11

What happens to mass as an object approaches the speed of light?

Accepted Answer

Mass will increase

Answer

Mass will decrease

Answer

Mass will stay the same

Answer

Mass will be 0.

Question 12

Time and space as one entity is known as

Accepted Answer

Space-time

Answer

Time dilation

Answer

Length contraction

Answer

Relativity

Question 13

For an object to go back in time, what speed does it need?

Accepted Answer

Faster than the speed of light

Answer

Same speed as the speed of light

Answer

Slower than the speed of light

Question 14

Which of the following statement is INCORRECT?

Accepted Answer

Time distorts spacetime causing it to curve

Answer

There is a relationship between mass, gravity, and spacetime.

Answer

Matter tells spacetime how to curve, spacetime tells matter how to move (orbit).

Answer

Gravity is curved spacetime

Question 15

We do not usually observe relativistic effects in our daily lives because

Accepted Answer

we are moving at speeds much less than c.

Answer

we are much larger than atoms.

Answer

we are much heavier than elementary particles.

Answer

we are much lighter than stars.

Question 16

Who was the creator of a special theory of relativity?

Accepted Answer

Albert Einstein

Answer

Marie Curie

Answer

Sir Isaac Newton

Answer

Michelson and Morley

Question 17

E=MC² is a formula that...

Accepted Answer

describes mass and energy as different manifestations of the same thing (like 2 sides of a coin)

Answer

describes how mass warps spacetime

Answer

describes the relationship between acceleration and gravitational pull

Answer

describes the relationship between the event horizon and the singularity of a black hole

Question 18

What does the relativity of simultaneity say?

Accepted Answer

There can NEVER be agreement on the simultaneity of events viewed from different reference point

Answer

If two events occur at the same time in one reference frame, they will occur at the same time in all reference frames.

Answer

There is ALWAYS agreement from all frames of reference on the simultaneity of events

Question 19

When you approach a light source, the light from that source has a speed

Accepted Answer

equal to c.

Answer

greater than c.

Answer

less than c.

Question 20

Compared to clocks in a stationary reference frame moving clocks run:

Accepted Answer

slower

Answer

faster

Answer

at the same rate

Question 21

There are two twins on Earth. One flies off on a spacecraft traveling 90% of 'c' while the other twin stays on Earth. Which of the following is TRUE?

Accepted Answer

All answers are true

Answer

The twin on the spacecraft will age more slowly than the Earth-bound sibling

Answer

Time in each frame of reference proceeds differently at different speeds

Answer

This is an example of the 'Twin Paradox'

Question 22

According to Einstein's theory of special relativity, what happens to the length of an object as it approaches the speed of light?

Accepted Answer

B) It decreases

Answer

A) It increases

Answer

C) It remains the same

Answer

D) It becomes infinite

Question 23

Which of the following equations represents the relationship between energy and mass in special relativity?

Accepted Answer

A) $$E = mc^2$$

Answer

B) $$E = mv^2$$

Answer

C) $$E = mc^3$$

Answer

D) $$E = mv^3$$

Question 24

In the context of special relativity, what is the significance of the speed of light?

Accepted Answer

A) It is the maximum speed at which information can travel

Answer

B) It is the speed at which time stops

Answer

C) It is the speed at which mass becomes infinite

Answer

D) It is the speed at which energy is zero

Question 25

What is the twin paradox in special relativity?

Accepted Answer

A) A thought experiment where one twin ages slower than the other due to traveling at high speeds

Answer

B) A situation where twins experience the same time dilation

Answer

C) A paradox where both twins age at the same rate despite one traveling at high speeds

Answer

D) A scenario where time travel is possible for twins

Special Relativity

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