Exam-style question
Try this first
Which statement best describes time dilation?.
- A.Time runs faster for moving observers.
- B.Time runs slower for moving observers.
- C.Time runs at the same rate regardless of motion.
- D.Time dilation only applies to light.
Model answer
What a good answer should say
- Time runs slower for moving observers.
Explanation
Why this works
From Δt = γ Δτ with γ > 1 for any v > 0, the dilated time Δt is larger than the proper time Δτ. Therefore a clock moving relative to an observer ticks slower than a stationary clock.
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