A metal surface of work function 3 eV is
illuminated by photons of energy 2 eV. The
kinetic energy of emitted photo-electrons
will be
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Photoelectrons will not be emitted .
We will use the Eienstien's photoelectric equation to find the speed of the electrons.
Equation -
K.E (max) = energy of photon - φ(work function of metal)
The photoelectrons will not be emitted as the energy of photon is less than the work function of the metal .
Therefore, there is no kinetic energy of the photoelectrons to calculate.
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