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Physics
Physics
Problem
The surface of a metal is illuminated alternately with photons of energies
E
1
=
4
E_1 = 4
E
1
=
4
eV and
E
2
=
2.5
E_2 = 2.5
E
2
=
2.5
eV 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 _______.
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