The work function for a metal is 5.58 eV. What is the threshold wavelength for the photoelectric effect of incident photons? A) 2.22 × 10^-7 m B) 2.22 × 10^-9 m C) 4.50 × 10⁶ m D) 4.50 × 10^-6 m E) 2.22 × 10^-11 m

Question

Quizplus · Accepted Answer

The threshold wavelength is calculated using the formula λ = hc/Φ, where h is Planck's constant, c is the speed of light, and Φ is the work function. Substituting the values, λ = (6.626 × 10^-34 Js)(3 × 10^8 m/s) / (5.58 eV × 1.602 × 10^-19 J/eV) gives approximately 2.22 × 10^-7 m.

The Work Function for a Metal Is 5