The work function of aluminium is 4.2 eV. If two photons, each of energy 3.5 eV strike an electron of aluminium, then emission of electrons will be

Question

The work function of aluminium is 4.2 eV. If two photons, each of energy 3.5 eV strike an electron of aluminium, then emission of electrons will be (A) Possible (B) Not possible (C) Data is incomplete (D) Depend upon the density of the surface

Tardigrade Admin · Accepted Answer

For emission of electrons incident energy of each photon must be greater than work function (threshold energy).

Q. The work function of aluminium is 4.2eV. If two photons, each of energy 3.5eV strike an electron of aluminium, then emission of electrons will be

Possible

Not possible

Data is incomplete

Depend upon the density of the surface

For emission of electrons incident energy of each photon must be greater than work function (threshold energy).

Q. The work function of aluminium is $4.2 e V$ . If two photons, each of energy $3.5 e V$ strike an electron of aluminium, then emission of electrons will be