When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface
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According to the law of conservation of energy, E is energy of incident radiation which is equal to work function of metal plus total kinetic energy of photoelectrons.
H*V0 is equal to W0 plus ½ mv raised to the power of 2.
Kinetic energy is h*V0-W0 as equation 1.
When E is increased by twenty percent, the new kinetic energy is 6/5 E0-W0 is equation 2.
Therefore, Kinetic energy 1 – Kinetic energy 2 is equal to E0/5.
The increase in Kinetic energy is E0/5.
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