Work function of aluminium is 4.2eV. If two photons, each of energy 3.5 eV strike an ele

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11.Dual Nature of Radiation and matter

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The work function of aluminium is $4.2eV.$ 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

Solution

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

Standard 12

Physics

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