Question

Photocurrent recorded in the microammeter in an experimental setup of photoelectric
Effect vanishes when the retarding potential ls more than 0.8 V if the wavelength of
incident radiation is 4950 A°, If the source of incident radiation is changed, the stopping
potential turns out to be 1.2 V. Find the work function of the cathode material and the
wavelength of the second source
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Answer 1

Answer:

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