Question

A photon of energy 3.5ev fall on the metal plate having threshod energy 2ev find kinetic energy of ejected electron in joule​

Answer 1

answer : .4eV

Explanation:

Work function of a metal is defined as the minimum energy required to eject out electron from metal surface . When a photon of energy 3.4eV is incident on a metal , 2eV energy will be used in ejecting an electron , because the work function of metal is 2eV . And the remaining energy 3.4−2=1.4eV , will be used by ejected electron as maximum kinetic energy .

Answer 2

Answer:

Work function of a metal is defined as the minimum energy required to eject out electron from metal surface . When a photon of energy 3.4eV is incident on a metal , 2eV energy will be used in ejecting an electron , because the work function of metal is 2eV . And the remaining energy 3.4−2=1.4eV , will be used by ejected electron as maximum kinetic energy

Explanation:

I hope it will be helpful