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A when a photon of energy hv is incidnet...

A when a photon of energy hv is incidnet on an electron in a metal of work function ` phi ( lt hv)` , the electron will not necesserily come out of the metal .
R : work function is the minimum energy required to liberate an electron out of a metal . So some electons may require more energy for their liberation .

A

If both Assertion & Reason are ture and the reason is the correct explanation of the assertion , then mark (1) .

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion , then mark (2) .

C

If Assertion is true statement but Reason is false , then mark (3)

D

If both Assertion and Reason are false statements , then mark (4) .

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A
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