Special Relativity MCQs with Answers

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Special Relativity Online Quiz

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• Test Name: Special Relativity MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Special Relativity

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1 / 40

Who formulated the theory of special relativity?

Isaac Newton

Albert Einstein

Max Planck

2 / 40

What is the proper length?

The length of an object measured in its rest frame

The length of an object measured in motion

The length of an object in a gravitational field

3 / 40

What is the term for the change in time interval between two events due to relative motion?

Length contraction

Mass increase

Time dilation

4 / 40

What is relativistic velocity addition?

The formula for adding velocities in a relativistic context

The decrease in velocity due to friction

The increase in velocity due to gravity

5 / 40

What does special relativity say about simultaneity?

Events that are simultaneous in one frame may not be simultaneous in another

Simultaneity is absolute

All observers agree on simultaneity

6 / 40

What is length contraction?

Objects moving at high speeds appear longer

Objects moving at high speeds appear shorter in the direction of motion

Objects moving at high speeds become heavier

7 / 40

What is proper time?

The time measured by a stationary observer

The time interval measured by a clock moving with the observer

The time interval between two distant stars

8 / 40

What does it mean when an object's velocity approaches the speed of light?

Its mass approaches infinity

Its mass approaches zero

Its mass remains constant

9 / 40

What is the significance of Minkowski spacetime?

It is the measure of time in classical mechanics

It is the

It is the mathematical model combining space and time into a four-dimensional continuum

10 / 40

What is the energy-momentum relation in special relativity?

p = mv

E = mc^2

E^2 = (pc)^2 + (mc^2)^2

11 / 40

What is the significance of the constant speed of light in special relativity?

It only applies in a vacuum

It varies with the observer's speed

It is the same for all observers regardless of their motion

12 / 40

What is the spacetime interval?

The distance between two stars

A measure of the separation between two events in spacetime

The time taken for light to travel between two points

13 / 40

What is the effect of gravity on light as predicted by general relativity?

Light speeds up in the presence of gravity

Light is absorbed by gravity

Light bends in the presence of gravity

14 / 40

What are the Lorentz transformations?

Equations that relate space and time coordinates between two inertial frames

Equations for wave functions

Equations describing gravitational fields

15 / 40

What is the concept that the laws of physics are the same in all inertial frames?

Principle of relativity

Principle of equivalence

Principle of uncertainty

16 / 40

What does the variable γ (gamma) represent in relativistic equations?

The gravitational constant

The Planck constant

The Lorentz factor

17 / 40

What is the famous equation derived from special relativity?

E = hν

E = mc^2

F = ma

18 / 40

What is the twin paradox?

A theory about identical particles

A hypothesis about star formation

A thought experiment where one twin ages slower than the other due to high-speed travel

19 / 40

What is the twin paradox intended to illustrate?

Time dilation

Length contraction

Mass increase

20 / 40

What is an inertial frame of reference?

A frame of reference with gravitational forces

A frame of reference that is accelerating

A frame of reference that is not accelerating

21 / 40

What is the name of the principle stating that the laws of physics are the same in all inertial frames of reference?

Principle of relativity

Principle of equivalence

Principle of causality

22 / 40

What is the concept that time can slow down for an object in motion relative to a stationary observer?

Mass increase

Length contraction

Time dilation

23 / 40

What is the consequence of traveling close to the speed of light on aging?

Aging speeds up

Aging remains the same

Aging slows down

24 / 40

What is relativistic mass?

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

The mass of an object at rest

The mass lost in a nuclear reaction

25 / 40

What happens to clocks moving at relativistic speeds compared to those at rest?

They run slower

They stop

They run faster

26 / 40

What is the speed of light in a vacuum?

Approximately 299,792 km/s

Approximately 500,000 km/s

Approximately 150,000 km/s

27 / 40

What is relativistic aberration?

The shift in the frequency of light due to motion

The apparent change in the direction of light due to relative motion

The bending of light by gravity

28 / 40

What is the relativistic Doppler effect?

The redshift of distant galaxies

The change in frequency of light or sound due to the relative motion of source and observer

The bending of light by gravity

29 / 40

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

It increases

It remains constant

It decreases

30 / 40

What is the relativistic momentum of an object?

p = γmv

p = m/a

p = mv

31 / 40

What does the theory of special relativity primarily deal with?

Low velocities

Quantum mechanics

High velocities close to the speed of light

32 / 40

What is the principle of relativity?

The speed of light is infinite

Gravity affects only large masses

The laws of physics are the same in all inertial frames of reference

33 / 40

What is the meaning of "light cone" in relativity?

The surface that represents the possible directions light can travel through spacetime

The path of a star's light in space

A device used to measure the speed of light

34 / 40

What is rest mass?

The mass of an object when it is not moving

The mass of an object under gravitational force

The mass of an object in motion

35 / 40

What is the Lorentz factor denoted by γ (gamma) equal to for an object moving at the speed of light?

Not defined

Zero

Infinity

36 / 40

What is the relativistic effect on the kinetic energy of a moving object?

It remains constant

It decreases

It increases more rapidly than at low speeds

37 / 40

What is the term for the maximum speed limit in the universe according to special relativity?

The escape velocity

The speed of sound

The speed of light

38 / 40

What is the relationship between energy and momentum for a photon?

E = pc

E = hν

E = mc^2

39 / 40

What is the impact of relativistic speeds on space?

Space remains unchanged

Space expands in the direction of motion

Space contracts in the direction of motion

40 / 40

What is the difference between general relativity and special relativity?

Special relativity includes gravity, general relativity does not

General relativity includes gravity, special relativity does not

General relativity deals with high speeds, special relativity does not

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