In a photo electric experiment, the metal surface is illuminated by a beam of light of intensity I and frequency ν. Maximum kinetic energy of photo electron is found to be Km. Keeping the intensity unchanged, if another light of frequency ν$$/2$$ is used in the same experimental set up, then saturated photo current

Question

In a photo electric experiment, the metal surface is illuminated by a beam of light of intensity I and frequency ν. Maximum kinetic energy of photo electron is found to be Km. Keeping the intensity unchanged, if another light of frequency ν$$/2$$ is used in the same experimental set up, then saturated photo current

Infinity Learn · Accepted Answer

Intensity I $$=$$ n. hν. where n is the number of photons crossing the cross section of incident beam in unit time. When ν$$1=$$ν$$2$$, $$I1=I=n1h$$ν$$2$$⇒$$n1=2nHence$$ saturated photo current is doubled.

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