The energy of a photon is equal to the kinetic energy of a proton. The energy of the photon is $E$. If $\lambda_1$ and $\lambda_2$ are the de Broglie wavelengths of the proton and the photon respectively,then find the ratio $\lambda_1 / \lambda_2$.

  • A
    $E^0$
  • B
    $E^{1/2}$
  • C
    $E^{-1}$
  • D
    $E^{-2}$

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