Dual Nature of Radiation and Matter (2nd PUC)

Photoelectric effect, Einstein's equation, de Broglie wavelength.

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Q1 · Dual Nature of Radiation and Matter (2nd PUC) · EASY
The work function of a metal is 2.5 eV. Light of wavelength 400 nm is incident on the metal surface. What is the maximum kinetic energy of the emitted photoelectrons? (Take h = 6.63×10⁻³⁴ Js, c = 3×10⁸ m/s, 1 eV = 1.6×10⁻¹⁹ J)