Q.

The work function (ϕ) of some metals is listed below' The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is

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answer is -0.54.

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Detailed Solution

En=E for H×Z2n2=−13.6×1225=−0.54eV
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The work function (ϕ) of some metals is listed below' The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is