NEET-XII-Physics

Question Set with answers year:2021

with Solutions - page 3
  • #29
    An electromagnetic wave of wavelength ' `` \lambda `` ' is incident on a photosensitive surface of negligible work function. If ' `` m `` ' mass is of photoelectron emitted from the surface has de-Broglie wavelength `` \lambda_{ d } `` , then :
    (A) `` \lambda=\left(\frac{2 m }{ hc }\right) \lambda_{ d }{ }^{2} ``
    (B) `` \lambda_{ d }=\left(\frac{2 mc }{ h }\right) \lambda^{2} ``
    (C) `` \lambda=\left(\frac{2 mc }{ h }\right) \lambda_{ d }{ }^{2} ``
    (D) `` \lambda=\left(\frac{2 h }{ mc }\right) \lambda_{ d }{ }^{2} ``
    digAnsr:   C
    :