cse • paper_2 • quantum_mechanics
[UPSC CSE 1989] Foundations of Quantum Mechanics (Q94, 20M)
Photoelectron are liberated by ultraviolet light of wavelength 3000\text{ \AA} from a metallic surface for which the photoelectric threshold is at 4000\text{ \AA}. Calculate the De Broglie wavelength of electrons emitted with maximum kinetic energy.
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