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According to the photoelectric effect, the plot of kinetic energy of the emitted photo-electrons from a metal versus the frequency of the incident radiation gives a straight line whose slope

Options

  1. Ais the same for all metals and independent of the intensity of radiation
  2. Bdepends only on the intensity of radiation
  3. Cdepends both on the intensity of the radiation and the metal used
  4. Ddepends on the nature of metals used

Correct answer

A. is the same for all metals and independent of the intensity of radiation

Step-by-step solution

For photoelectric effect, = ₀+( KE )_ where, = energy of incident photon =h v aligned & aligned & ₀= work function of material of metal on & which photon is falling &( KE )_ = Maximum kinetic energy of emitted & photoelectrons. aligned & So, on putting the values & aligned h v= ₀+( KE )_ where, v= frequency of falling photon and h= Planck's constant. aligned aligned On comparing Eqs. (i) and (ii), we get m=h= constant So, the slope of ( KE )_ versus v graph is same for all metals and independent of the intensity of

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