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  4. When photons of energy h v fall on an aluminium plate (of work function E0 ), photoelectrons of maximum kinetic energy K are ejected. If the frequency of radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

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Q. When photons of energy $h v$ fall on an aluminium plate (of work function $E_{0}$ ), photoelectrons of maximum kinetic energy $K$ are ejected. If the frequency of radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

Haryana PMTHaryana PMT 2008Dual Nature of Radiation and Matter

Solution:

According to given situation
$hv = E _{0}+ K $ & $2 hv = E _{0}+ K '$
$ \Rightarrow K'= K + hv$