In a photoelectric experiment, the collector plate is at 2.0V with respect to the emitter plate made of copper φ = 4.5 eV ). The emitter is illuminated by a source of monochromatic light of wavelength

Question

In a photoelectric experiment, the collector plate is at 2.0V with respect to the emitter plate made of copper φ = 4.5 eV ). The emitter is illuminated by a source of monochromatic light of wavelength 200nm.

TestHub · Accepted Answer

K m a x ​ = 200 1240 ​ − 4.5 = 1.7 eV The collector adds 2 eV to each arriving electron K m a x ′ ​ = 1.7 + 2 = 3.7 eV Reversing the voltage stops every emitted electron

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