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| Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
|---|---|---|---|---|---|---|
| 18.3 | Space and Time in Einstein Theory of Relativity |
1. The time measured by a clock inside a spaceship moving at 0.5 c shows 36 days from the taking off to the landing instant. How many days did the mission last when viewed from Earth?
Correct Answer: C
2. A star is moving at 0.6 c in a direction which is perpendicular to our sight. What is the radius of this star (if measured from a point on its surface) if the thickness calculated by an observer at rest on Earth surface is 4 × 106 km?
Correct Answer: A
3. A 20 m long and 5 m high wagon is moving very fast, at 0.3 c along horizontal tracks. What is the height of wagon when viewed from a fixed point outside the wagon?
Correct Answer: C
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