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A photon and an electron (mass m ) have the same energy E . The ratio ( _ photon / _ electron ) of their de Broglie wavelengths is: (c is the speed of light)

Options

  1. AE / 2 ~m
  2. Bc 2 mE
  3. Cc 2 ~m E
  4. D1 c E / 2 m

Correct answer

C. c 2 ~m E

Step-by-step solution

Photon & electron have same energy E _ photon _ electron = h c E h 2 mE =c 2 ~m E

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