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JIPMER2011PhysicsDual Nature of Matter

Light of frequency v falls on material of threshold frequency v₀ . Maximum kinetic energy of emitted electron is proportional to

Options

  1. Av-v₀
  2. Bv
  3. Cv-v₀
  4. Dv₀

Correct answer

A. v-v₀

Step-by-step solution

When light falls on a metallic surface, ejection of photoelectron results. In this process, conservation of energy holds. Thus, from law of conservation of energy, Energy imparted by the photon = Maximum kinetic energy of the emitted electron + work function of the metal or h v=( KE )_ + but =h v₀, v₀ being threshold frequency. array ll & ( KE )_ =h v-h v₀ or & ( KE )_ v-v₀ array

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