Special Relativity
Physics ⇒ Modern Physics
Special Relativity starts at 11 and continues till grade 12.
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See sample questions for grade 11
A muon has a mean lifetime of 2.2 μs at rest. If it moves at 0.995c, what is its mean lifetime as measured by a stationary observer? (γ ≈ 10)
A particle moves at 0.99c. What is its Lorentz factor (γ)?
A spaceship travels at 0.5c. If its rest mass is 1000 kg, what is its relativistic mass? (m = m0 / √(1 - v²/c²))
A spaceship travels at 0.8c relative to Earth. If 10 years pass on Earth, how much time passes on the spaceship? (Use the time dilation formula: t' = t / γ, where γ = 1 / √(1 - v²/c²))
Define an inertial frame of reference.
Describe the twin paradox in special relativity.
Explain the concept of simultaneity in special relativity.
Explain why nothing can travel faster than the speed of light according to special relativity.
Explain why the concept of absolute space and time was replaced by the concept of spacetime in special relativity.
If a clock on a spaceship moving at 0.6c measures 1 hour, how much time passes on Earth? (γ = 1.25)
If a light pulse is emitted from the center of a moving train, how does its speed appear to an observer on the train and an observer on the platform?
If a rod is 2 m long at rest, what is its length when moving at 0.8c relative to an observer? (Use L = L0 × √(1 - v²/c²))
If the length of a spaceship is measured as 100 m at rest, what is its length when moving at 0.9c? (L = L0 × √(1 - v²/c²))
State the two postulates of Einstein’s Special Theory of Relativity.
The formula for time dilation is t' = t / γ. What does t' represent?
What is meant by the term 'proper time' in special relativity?
What is meant by time dilation in special relativity?
What is the Lorentz factor (γ) for an object moving at 0.6c? (γ = 1 / √(1 - v²/c²))
What is the main difference between special relativity and general relativity?
What is the rest mass energy of a 2 kg object? (E = mc2, c = 3.00 × 108 m/s)
