Initially, a photon of wavelength λ1 strikes a photocathode, resulting in the emission of photoelectrons with a maximum kinetic energy of E1. When the wavelength of the incident photon is changed to λ2, the maximum kinetic energy of the emitted photoelectrons becomes E2. Which of the following expressions correctly represents the product hc, where h is Planck's constant and c is the speed of light?

(E1 + E2)(λ2 - λ1) / (λ1λ2)

(E1 - E2)(λ2 - λ1) / (λ1λ2)

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Initially, a photon of wavelength λ1 strikes a photocat... | Physics MCQ #140 | Examora | Examora