Modern Physics 4 Question 26

27. An α-particle and a proton are accelerated from rest by a potential difference of 100V. After this, their de-Broglie wavelengths are λα and λp respectively. The ratio λpλα, to the nearest integer, is

(2010)

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Solution:

  1. λ=hp=h2qqVm or λ1qm

λpλα=qαqpmαmp=(2)(4)(1)(1)=2.828

The nearest integer is 3 .

Answer is 3 .



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