A particle is travelling 4 times as fast as an electron. Assuming the ratio of de-Broglie wavelength of a…

A particle is travelling 4 times as fast as an electron. Assuming the ratio of de-Broglie wavelength of a particle to that of electron is 2: 1, the mass of the particle is :-
  1. 116 times the mass of e-
  2. 8 times the mass of e-
  3. 16 times the mass of e-
  4. 18 times the mass of e-

Solution

λ=hp
λpλe=pepp=mevempVp
2=mempve4ve
∴ mp=me8

Asked in: JEE Main 2021 (18 Mar Shift 1)

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