1. Tardigrade
  2. Question
  3. Physics
  4. Statement-1: A metallic surface is irradiated by a monochromatic light of frequency v>v0 (the threshold frequency). The maximum kinetic energy and the stopping potential are K max and V0 respectively. If the frequency incident on the surface is doubled, both the K max and V0 are also doubled. Statement-2: The maximum kinetic energy and the stopping potential of photoelectrons emitted from a surface are linearly dependent on the frequency of incident light.

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Q. Statement-1 : A metallic surface is irradiated by a monochromatic light of frequency $v>v_{0}$ (the threshold frequency). The maximum kinetic energy and the stopping potential are $K_{\max }$ and $V_{0}$ respectively. If the frequency incident on the surface is doubled, both the $K_{\max }$ and $V_{0}$ are also doubled.

Statement-2 : The maximum kinetic energy and the stopping potential of photoelectrons emitted from a surface are linearly dependent on the frequency of incident light.

AIEEEAIEEE 2011Dual Nature of Radiation and Matter

Solution:

$k_{\max }=h f-\phi$
$k_{\max }'=2 h f-\phi$
$k_{\max }'=2 k_{\max }+\phi$
$k_{\max }'>2 k_{\max }$