A photon of energy 3.4 eV is incident on a metal having work function 2 eV . The maximum…

Physics · JEE Advanced · NTA ExamsAtoms and Nuclei

A photon of energy 3.4 eV is incident on a metal having work function 2 eV. The maximum K.E. of photo-electrons is equal to
  1. 1.4 eV
  2. 1.7 eV
  3. 5.4 eV
  4. 6.8 eV

Answer

(A) 1.4 eV

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