A relativistic particle moves with a constant velocity v with respect to the laboratory frame. In time \tau, measured in the rest frame of the particle, the distance that it travels in the laboratory frame is

Special theory of relativity — CSIR Net PYQ (Question 5)

A Special theory of relativity previous-year question (PYQ) from Classical Mechanics (CSIR Net). Read the question, check the correct answer, then practise the full topic.

Question 5 of 27 · 3.5 marks

A relativistic particle moves with a constant velocity

v

with respect to the laboratory frame. In time

τ

, measured in the rest frame of the particle, the distance that it travels in the laboratory frame is

1 $v τ$
2 $\frac{c τ}{1 - \frac{v ^{2}}{c ^{2}}}$
3 $v τ 1 - \frac{v ^{2}}{c ^{2}}$
4 $\frac{v τ}{1 - \frac{v ^{2}}{c ^{2}}}$

Correct answer: Option 4

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