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Q.

When the energy of the incident radiation is increased by 40%, the kinetic energy of the photoelectrons emitted from a metal surface increases from 0.8 eV to 1.2 eV. The work function of the metal is

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a

5.8 eV

b

2 eV

c

0.2 eV

d

0.4 eV

answer is B.

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Detailed Solution

detailed_solution_thumbnail

100140=0.8+w1.2+w

∴ w=0.2ev

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