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Special Relativity Flashcards | StudBud
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Special Relativity
Special Relativity
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1
Which of the following is a direct consequence of special relativity?
The expansion of the universe
The formation of black holes
The bending of light around massive objects
The twin paradox
2
Why can't any object with mass reach the speed of light?
It would transform into a photon
It would disappear from the universe
It would require infinite energy
It would break the time-space continuum
3
What is the name of the phenomenon where an object's length appears shorter when moving at relativistic speeds?
Doppler Effect
Time Dilation
Length Contraction
Gravitational Lensing
4
How does simultaneity change in special relativity?
Different observers moving to each other may disagree on simultaneity
Events that are simultaneous in one frame are simultaneous in all frames
The speed of light is different for different observers
Time always runs at the same rate regardless of motion
5
What is the principle of relativity?
The speed of light is different for moving observers
The speed of light is different for moving observers
The universe revolves around the observer
The laws of physics are the same in all inertial frames
6
1. What is the fundamental postulate of special relativity?
The speed of light is constant in a vacuum
The speed of light varies depending on the observer's motion
Newton's laws apply in all reference frames
Time and space are absolute quantities
7
What is the equation for time dilation in special relativity?
t′=t(1+v/c)t' = t(1 + v/c)t′=t(1+v/c)
t′=t1−v2/c2
t′=t×v/c
t′=t/v
8
What does the Lorentz factor (γ\gamma) represent in special relativity?
The energy of a moving object
The ratio of time dilation and length contraction
The gravitational attraction between moving objects
The speed of an object relative to light
9
If you shine a flashlight while moving at 99% the speed of light, what speed does the light beam travel at?
Exactly the speed of light
198% the speed of light
Slower than light due to time dilation
99% the speed of light
10
If a spaceship travels at 90% the speed of light, how does its mass appear to an outside observer?
The mass decreases
The mass increases
The mass becomes infinite
The mass remains the same
11
What happens to the momentum of an object as it approaches the speed of light?
It remains constant
It decreases
It increases infinitely
It depends only on the object's acceleration
12
What would happen if you could travel faster than light, according to special relativity?
You would travel back in time with no other effects
You would age faster than stationary observers
You would experience infinite mass and require infinite energy
Your length would increase instead of contract
13
What is the famous equation derived from special relativity that relates mass and energy?
E=mv2
E=m/c2
E=mc2
E=mc3
14
In the twin paradox, why does the traveling twin age less than the twin on Earth?
The Earth-bound twin experiences gravitational time dilation
The traveling twin actually ages faster, not slower
The traveling twin moves faster, which speeds up their biological processes
The traveling twin experiences time dilation due to high velocity
15
What happens to time as an object moves closer to the speed of light?
Time slows down
Time speeds up
Time stops completely
Time remains unchanged
