The work function of sodium metal is 4.41 × 10⁻¹⁹ J. If photons of wavelength 300 nm are incident on the metal, the kinetics energy of the ejected electrons will be (h = 6.63 × 10⁻³⁴ Js; c = 3 × 10⁸ m/s) × 10⁻²¹ J. [numerical value].
The work function of sodium metal is 4.41 × 10⁻¹⁹ J. If photons of wavelength 300 nm are incident on the metal, the kinetics energy of the ejected electrons will be (h = 6.63 × 10⁻³⁴ Js; c = 3 × 10⁸ m/s) × 10⁻²¹ J. [numerical value].
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1 Answer
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KE_max = hc/λ - φ = 6.63e-19 - 4.41e-19 = 2.22e-19 = 222e-21 J.
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