Does the photoelectric effect occur in zinc under the action of radiation with a wavelength of 0.35 μm?

| February 9, 2021 | education

Does the photoelectric effect occur in zinc under the action of radiation with a wavelength of 0.35 μm? The work function of electrons from zinc is 4.2 eV.

To determine the possibility of the occurrence of the photoelectric effect under the given conditions, the following inequality is required: h * ν> Aout; h * Vc / λ> Aout.

Data: h – Planck’s constant (h = 6.626 * 10 ^ -34 J * s); Vc is the speed of propagation of light (Vc = 3 * 10 ^ 8 m / s); λ is the wavelength of the presented radiation (λ = 0.35 μm = 35 * 10 ^ -8 m); Aout is the work function of electrons from zinc (according to the condition Aout = 4.2 eV = 6.729 * 10 ^ -19 J).

Let’s perform the calculation: 6.626 * 10 ^ -34 * 3 * 10 ^ 8 / (35 * 10 ^ -8)> 6.729 * 10 ^ -19 J.

5.679 * 10 ^ -19 J> 6.729 * 10 ^ -19 J (incorrect).

Answer: There will be no photo effect.



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