An electron (of mass m ) and a photon have the same energy E in the range of a few e V . The ratio of the…

An electron (of mass m ) and a photon have the same energy E in the range of a few eV. The ratio of the de-Broglie wavelength associated with the electron and the wavelength of the photon is ( c= speed of light in vacuum)
  1. 1c2Em1/2
  2. c(2mE)1/2
  3. 1cE2m1/2
  4. E2m1/2

Solution

λd for electron =h2mE
λ for photon =hCE
Ratio =h2mEEhC=1CE2m

Asked in: JEE Main 2020 (07 Jan Shift 2)

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