Verified Solution • 2025–26 Session moderate

QPages 440-441: Q18: HC Verma: Concepts of Physics - Volume 2 The Nucleus Pages 440-441: Q18 Solution: Free nuclei kept in a train emit alpha particles. When the…

Free 238U^{238}\text{U} nuclei kept in a train emit alpha particles. When the train is stationary and a uranium nucleus decays, a passenger measures that the separation between the alpha particle and the recoiling nucleus becomes x in time t after the decay. If a decay takes place when the train is moving at a uniform speed v, the distance between the alpha particle and the recoiling nucleus at a time t after the decay, as measured by the passenger will be

Multiple Choice Options

  • A x+vtx + vt
  • B x−vtx - vt
  • C xx
  • D depends on the direction of the train.

Step-by-Step Verified Solution

**Answer:** (c) x. **Step-by-Step Explanation:** The separation between the alpha particle and the recoiling nucleus is independent of the train's motion.

All Questions in this Chapter

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