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When light of 2.5 eV falls on a metal su...

When light of 2.5 eV falls on a metal surface, maximum kinetic energy of electron is T. If incident radiation of 4 eV falls on same metal surface, maximum kinetic energy of electrons is doubled. The work function of metal is

A

1 eV

B

4 eV

C

1 .5 eV

D

0 .5 eV

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The correct Answer is:
A
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