Does the photoelectric effect occur in zinc under the action of radiation having a wavelength of 0.45 μm.

For the possibility of the appearance of the photoeffect in zinc under the given conditions, the following inequality must be fulfilled: h * ν> Aout; h * Vc / λ> Aout.

Data: h – Planck’s constant (h = 6.62607 * 10 ^ -34 J * s); Vc – speed of light (Vc = 3 * 10 ^ 8 m / s); λ is the wavelength of the radiation under consideration (λ = 0.45 μm = 0.45 * 10 ^ -6 m); Aout – work function (for zinc Aout = 4.22 … 4.27 eV; Aout = 6.761 * 10 ^ -19 … 6.841 * 10 ^ -19 J).

Let’s calculate: 6.62607 * 10 ^ -34 * 3 * 10 ^ 8 / (0.45 * 10 ^ -6)> 6.761 * 10 ^ -19 … 6.841 * 10 ^ -19 J.

4.41738 * 10 ^ -19 J> 6.761 * 10 ^ -19 … 6.841 * 10 ^ -19 J (incorrect).

Answer: There will be no photo effect.