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In the photoelectric experiment, if we use a monochromatic light, the photoelectric current vs voltage curve is as shown. If work function of the metal is 2eV, estimate the power of light used. (Assume efficiency of photo emission = 10−3%, i.e., number of photoelectrons emitted are 10−3% of number of photons incident on metal) |
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Answer» In the photoelectric experiment, if we use a monochromatic light, the photoelectric current vs voltage curve is as shown. If work function of the metal is 2eV, estimate the power of light used. (Assume efficiency of photo emission = 10−3%, i.e., number of photoelectrons emitted are 10−3% of number of photons incident on metal)
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