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

Possible

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Not possible

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Data is incomplete

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Depend upon the density of the surface

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Solution

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

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

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