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Lorentz Transformations Practice Questions

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The following physics revision questions are provided in support of the physics tutorial on Lorentz Transformations. In addition to this tutorial, we also provide revision notes, a video tutorial, revision questions on this page (which allow you to check your understanding of the topic) and calculators which provide full, step by step calculations for each of the formula in the Lorentz Transformations tutorials. The Lorentz Transformations calculators are particularly useful for ensuring your step-by-step calculations are correct as well as ensuring your final result is accurate.

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Relativity Learning Material
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18.5Lorentz Transformations

Physics Revision Questions for Lorentz Transformations

1. A spaceship is moving at 20 000 m/s (linear motion at constant speed). It emits a signal moving at 100 km/s relative to the spaceship in the same direction. What is the velocity of signal when viewed from Earth?

  1. 1.2 × 105 m/s
  2. 2.0 × 104 m/s
  3. 1.2 × 104 m/s
  4. 2.0 × 105 m/s

Correct Answer: A

2. A 20 cm long bar is moving at 0.6c. What is its length viewed from a fixed point on Earth surface?

  1. 19.60 cm
  2. 16.00 cm
  3. 12.00 cm
  4. 11.88 cm

Correct Answer: B

3. An event appears in the inertial system S 20 s after the system S' has moved away at 0.2c. Initially the two systems have been at the same position. How much time does it take to the event to occur when viewed from S'?

  1. 19.20 s
  2. 19.59 s
  3. 19.62 s
  4. 20.00 s

Correct Answer: B

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  2. Relativity Physics tutorial: Lorentz Transformations. Read the Lorentz Transformations physics tutorial and build your physics knowledge of Relativity
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  4. Check your calculations for Relativity questions with our excellent Relativity calculators which contain full equations and calculations clearly displayed line by line. See the Relativity Calculators by iCalculator™ below.
  5. Continuing learning relativity - read our next physics tutorial: Relativistic Dynamics. Mass, Impulse and Energy in Relativity

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