Radition from hydrogen discharge tube falls on a cesium plate. Find the maximum possible kinetic energy of the photoelectrons. Work function of cesium is 1.9 e V.

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Solution

Given $W_{c e s}$ = 1.9 e V

the raditions coming from the Hydrogen discharge tube consist of photons of energy is equal to 13.6 e V.

Maximum KE of photoelectrons emitted

= Energy od Photons - work function of metal

= 13.6 e V - 1.9 e V = 11.7 e V

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Radition from hydrogen discharge tube falls on a cesium plate. Find the maximum possible kinetic energy of the photoelectrons. Work function of cesium is 1.9 e V.

Given Wces = 1.9 e V the raditions coming from the Hydrogen discharge tube consist of photons of energy is equal to 13.6 e V. Maximum KE of photoelectrons emitted = Energy od Photons - work function of metal = 13.6 e V - 1.9 e V = 11.7 e V

Given $W_{c e s}$ = 1.9 e V

the raditions coming from the Hydrogen discharge tube consist of photons of energy is equal to 13.6 e V.

Maximum KE of photoelectrons emitted

= Energy od Photons - work function of metal

= 13.6 e V - 1.9 e V = 11.7 e V