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When the energy of the incident radiation is increased by 20% the kinetic energy of the photo-electrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is

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1.0 eV

1.3 eV

1.5 eV

0.65 eV

answer is A.

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Detailed Solution

6w+3 = 5w+4; w = 1.0 eV

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