Question

When a light of wave length 2 and
photon energy 2eV falls on a metal
surface, electrons are emitted with
maximum speed v. If the wave length is
decreased by 25% the maximum speed
of the emitted electron becomes 2V. Find
the work function
(1) 2.4 eV
(2) 1.78 eV
(3) 4.2 eV (4) 3.6 eV​

Answer 1

Answer:

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