Ultraviolet light of wavelength illuminates a metal surface

PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation

Problem

Ultraviolet light of wavelength

300\,\text{nm}

illuminates a metal surface. The photocurrent is just stopped when the collector is

0.50\,\text{V}

negative relative to the emitter. Determine the work function of the metal in electron-volts.