In a photocell experiment, ultraviolet light of wavelength 300 nm shines on the plate, and then violet light of wavelength 400 nm. The fastest photoelectrons knocked out by the ultraviolet light carry 3 times the kinetic energy of the fastest ones knocked out by the violet light. Find the work function of the plate. Use hc = 1240.8 eV nm.

ChemistryMediumHigh School (11–12)Structure of the Atom › Subatomic Particles and Atomic Models JEE Main

In a photocell experiment, ultraviolet light of wavelength $300\ \text{nm}$ shines on the plate, and then violet light of wavelength $400\ \text{nm}$ . The fastest photoelectrons knocked out by the ultraviolet light carry $3$ times the kinetic energy of the fastest ones knocked out by the violet light. Find the work function of the plate. Use $hc = 1240.8\ \text{eV nm}$ .

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