Space-time MCQs with Answers

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Space-time Online Quiz

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• Test Name: Space-time MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Space-time

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1 / 40

Who formulated the theory of general relativity?

Albert Einstein

Stephen Hawking

Isaac Newton

2 / 40

What is the main observational evidence for the expansion of the universe?

The cosmic microwave background radiation

The redshift of distant galaxies

The abundance of hydrogen in the universe

3 / 40

What is the speed of light in a vacuum?

Approximately 299,792 km/s

Approximately 100,000 km/s

Approximately 500,000 km/s

4 / 40

What does the theory of general relativity describe?

The curvature of space-time by mass and energy

The chemical composition of stars

The behavior of light

5 / 40

What is gravitational time dilation?

Time runs faster in stronger gravitational fields

Time remains the same regardless of gravitational fields

Time runs slower in stronger gravitational fields

6 / 40

What does the term "spacetime continuum" refer to?

Space independent of time

The combination of the three dimensions of space with the one dimension of time

Time independent of space

7 / 40

What are tidal forces?

The influence of solar radiation on space-time

Variations in gravitational pull experienced over an object

The effect of ocean tides on space-time

8 / 40

What is an event horizon?

The edge of the universe

The boundary around a black hole beyond which nothing can escape

The surface of a star

9 / 40

What is a geodesic in space-time?

A type of spacecraft trajectory

A line connecting two galaxies

The shortest path between two points in curved space-time

10 / 40

What is time-like interval in relativity?

An interval where events are simultaneous

An interval where events are causally connected

An interval where events are spatially separated

11 / 40

What is the shape of space-time around a massive object?

Zigzag

Curved

Flat

12 / 40

What is a Lorentz transformation?

The theory of gravitational waves

The mathematical equations relating the space and time coordinates of two systems moving at constant velocity relative to each other

The process of converting mass to energy

13 / 40

What is a wormhole?

A hypothetical tunnel connecting distant points in space-time

A small star

A type of black hole

14 / 40

What happens to time as an object approaches a black hole?

It speeds up

It slows down

It remains constant

15 / 40

What is the effect of gravity on light according to general relativity?

Light bends in the presence of gravity

Light speeds up in the presence of gravity

Light is absorbed by gravity

16 / 40

What is the twin paradox?

A theory about quantum entanglement

A situation where twins experience different gravitational forces

A thought experiment in special relativity involving identical twins, one of whom travels at high speed

17 / 40

What is special relativity?

The theory dealing with the laws of physics in the absence of gravity

The theory dealing with the gravitational force

The study of special particles in physics

18 / 40

What is the term for an object moving faster than the speed of light?

Tachyon

Neutrino

It is theoretically impossible

19 / 40

What is space-time?

A four-dimensional continuum combining space and time

A three-dimensional space without time

Time measured by space intervals

20 / 40

What does the term "spaghettification" refer to in astrophysics?

The expansion of the universe

The collapse of a star into a black hole

The stretching of objects into long thin shapes in a strong gravitational field

21 / 40

What phenomenon occurs when an object approaches the speed of light?

Its length contracts and time slows down

It becomes invisible

It gains infinite mass

22 / 40

What is a black hole?

A large star

A region of space where the gravitational pull is so strong that nothing, not even light, can escape

A dense cloud of gas and dust

23 / 40

What is a gravitational wave?

A fluctuation in the magnetic field

A type of sound wave

A ripple in space-time caused by accelerating masses

24 / 40

What is the significance of the Schwarzschild radius?

It is the radius at which the escape velocity equals the speed of light

It is the radius of the Sun

It is the radius of the Earth

25 / 40

What is the main difference between general relativity and special relativity?

Special relativity includes gravity, general relativity does not

General relativity is limited to high speeds, special relativity is not

General relativity includes gravity, special relativity does not

26 / 40

What is the fourth dimension in space-time?

Height

Time

Width

27 / 40

What is a light-year?

The distance light travels in one year

The speed of light per year

The time taken for light to travel a certain distance

28 / 40

What is the main idea of the block universe theory?

Past, present, and future all exist simultaneously

The universe is static and unchanging

Time flows in one direction only

29 / 40

Who formulated the special theory of relativity?

Max Planck

Albert Einstein

Niels Bohr

30 / 40

What is time dilation?

The slowing down of time in a strong gravitational field or at high speeds

The speeding up of time

The constant flow of time

31 / 40

What is a frame of reference?

A fixed point in space

A coordinate system used to measure positions and movements

A type of telescope

32 / 40

What is the cosmological constant?

The speed of light

The rate of expansion of the universe

A term introduced by Einstein to allow for a static universe

33 / 40

What is the purpose of the Michelson-Morley experiment?

To detect gravitational waves

To measure the speed of light

To demonstrate the absence of the aether and support the theory of relativity

34 / 40

Who proposed the concept of space-time?

Isaac Newton

Galileo Galilei

Albert Einstein

35 / 40

What is the equivalence principle?

The principle stating that gravitational and inertial forces are indistinguishable in a small region of space-time

The theory that all particles have an equivalent wave function

The idea that all forces are equal

36 / 40

What does E=mc^2 represent?

The force of gravity

The speed of light

The equivalence of mass and energy

37 / 40

What is the term for the effect of massive objects bending light?

Reflection

Refraction

Gravitational lensing

38 / 40

What is a singularity?

A large galaxy cluster

A type of neutron star

A point where density becomes infinite and space-time curvature becomes infinite

39 / 40

What is the concept of spacetime curvature?

The distance between two points in space

The straight path of an object in motion

The bending of space and time around a mass

40 / 40

What is the fabric of space-time often compared to?

A rubber sheet

A water surface

A metal plate

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