What is Einstein’s first postulate of special relativity?

The laws of physics are the same in all inertial frames

What is time dilation?

Time slows down for moving observers

What is true for all inertial frames of reference in special relativity?

The laws of physics are identical

What frame of reference observes length contraction?

The stationary observer's frame

Why do muons reaching Earth's surface support special relativity?

Time dilation increases their lifespan

What is Einstein’s second postulate?

The speed of light is the same for all observers

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

It’s the fastest speed possible

In the twin paradox, who ages less?

The twin who travels near light speed

In the train thought experiment, why do observers disagree on lightning strikes?

Different frames disagree on simultaneity

As an object moves faster, its momentum…

Increases dramatically near light speed

What causes length contraction?

Speed approaching the speed of light

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Special relativity

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Answers

1
What is Einstein’s first postulate of special relativity?
The speed of light is constant
Light bends in space
Time slows down near mass
The laws of physics are the same in all inertial frames
2
What is time dilation?
Time becomes imaginary
Time stretches for stationary observers
Time slows down for moving observers
Time goes faster at high speed
3
What is true for all inertial frames of reference in special relativity?
They observe time the same way
They must be moving slowly
They experience acceleration
The laws of physics are identical
4
What frame of reference observes length contraction?
The rotating frame
Any non-inertial frame
The moving object's frame
The stationary observer's frame
5
Why do muons reaching Earth's surface support special relativity?
They move randomly
They change into electrons
Time dilation increases their lifespan
They defy gravity
6
What is Einstein’s second postulate?
The speed of light is the same for all observers
Energy is conserved
Time depends on gravity
All objects fall at the same rate
7
Which equation is used to calculate time dilation?
E = mc²
t = t₀ / √(1 – v²/c²)
F = ma
t = d/s
8
What is the significance of the speed of light in special relativity?
It varies with speed
It’s only true in a vacuum
It’s the fastest speed possible
It can be exceeded in a black hole
9
In the twin paradox, who ages less?
Both age equally
The twin who travels near light speed
The older twin
The twin who stays on Earth
10
Which experiment used atomic clocks on planes to test time dilation?
Michelson-Morley
Fizeau water wheel
Rutherford’s scattering
Hafele-Keating
11
In the train thought experiment, why do observers disagree on lightning strikes?
Light travels faster inside trains
Air resistance changes perception
Different frames disagree on simultaneity
Time is absolute in all frames
12
As an object moves faster, its momentum…
Decreases
Increases linearly
Increases dramatically near light speed
Stays the same
13
What causes length contraction?
Speed approaching the speed of light
Gravity pulling objects inward
Time running backward
Faster motion compressing space
14
What does relativistic momentum depend on?
Only mass
Gravity only
Mass and speed near light
Distance and time
15
What happens to mass as an object nears light speed?
It disappears
It increases
It stays constant
It decreases

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