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Radiation from hydrogen discharge tube f...

Radiation from hydrogen discharge tube falls on a cesium plate. Find the maximum possible kinetic energy of the photoelectron. work function of cesium is `1.9ev`

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The correct Answer is:
A
Given `W_(ces) = 1.9 eV`
the radiations coming from the Hydrogen discharges tube consist of photons of energy is equal to `13.6 eV.`
Maximum KE of photoelectrons emitted
`=Energy of Photons -Work function of metal`
`=13.6eV-19ev = 11.7 eV`
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