JEE Mains 05-Sep-2020 Shift 2 Solved Paper

Section: Physics

Question : 21 of 75

Marks: +1, -0

The surface of a metal is illuminated alternately with photons of energies E1=4eV and E2=2.5eV respectively. The ratio of maximum speeds of the photoelectrons emitted in the two cases is 2. The work function of the metal in(eV) is ______.

[5 Sep 2020 Shift 2]

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