MCQ
Photon and electron are given same energy $({10^{ - 20}}J)$. Wavelength associated with photon and electron are ${\lambda _{Ph}}$ and ${\lambda _{el}}$ then correct statement will be
  • ${\lambda _{Ph}} > {\lambda _{el}}$
  • B
    ${\lambda _{Ph}} < {\lambda _{el}}$
  • C
    ${\lambda _{Ph}} = {\lambda _{el}}$
  • D
    $\frac{{{\lambda _{el}}}}{{{\lambda _{Ph}}}} = C$

Answer

Correct option: A.
${\lambda _{Ph}} > {\lambda _{el}}$
a
(a) Wavelength of photon will be greater than that of electron because mass of photon is less than that of electron

$ \Rightarrow {\lambda _{{\rm{ph}}}} > {\lambda _e}$

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