Work function gives the work required for an electron to be emitted from a surface. The work function emitted with photoelectrons of kinetic energy 1.05 eV is 4.74eV.
<h3>What is the photoelectric effect?</h3>
The photoelectric effect is the emission of an electron by the projected beam of light with energy greater than the work function.
The photoelectric effect is given as,
E = φ + KE
Given,
Kinetic energy of photoelectrons = 1.682 10⁻¹⁹ J (as, 1eV = 1.602 x 10⁻¹⁹ J)
Frequency = 1.40x10¹⁵ s⁻¹
Work function (φ) =?
The work function with respect to frequency is given as,
(6.623 x 10⁻³⁴Js)(1.40x10¹⁵ s⁻¹) = φ + 1.682 x 10⁻¹⁹ J
φ = (9.272 x 10⁻¹⁹) - (1.682 x 10⁻¹⁹)
φ = 7.590 x 10⁻¹⁹ J
Work function in eV is converted as, 1eV = 1.602 x 10⁻¹⁹ J
= 4.74 eV
Therefore, the work function is 4.74eV.
Learn more about work function here:
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