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Question: Answered & Verified by Expert
A proton when accelerated through a potential difference of V volt has a wavelength λ  associated with it. An α - particle in order to have the same λ  must be accelerated through potential difference of
PhysicsDual Nature of MatterNEET
Options:
  • A V volt
  • B 4V volt
  • C 2V volt
  • D V/8  volt
Solution:
1180 Upvotes Verified Answer
The correct answer is: V/8  volt
λP=λα

or h2mpQPVp=h2mαQαVα

∴       m p Q p V p = m α Q α V α

∴        V α = m p m α Q p Q α V = 1 4 1 2 V = V 8

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