The work function ( ϕ ) of some metals is listed below. The number of metals which will show photoelectric…
The work function () of some metals is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metals is :
2
4
6
8
Solution
Energy of photon
For photoelectric effect to occur, energy of incident photons, must be greater than work functions of metal. Hence, only Li, Na, K and Mg have work functions less than 4.14 V.
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