AIPMT MAINS 2009 Physics Photoelectric Equation MCQ Question
The Figure shows a plot of photo current versus anode potential for a photo sensitive surface for three different radiations. Which one of the following is a correct statement?
curves (a) and (b) represent incident radiations of same frequency but of different intensities.
curves (b) and (c) represent incident radiations of different frequencies and different intensities.
curves (b) and (c) represent incident radiations of same frequency having same intensity.
curves (a) and (b) represent incident radiations of different frequencies and different intensities.
Correct Answer
Detailed Explanation
Curves with the same stopping potential indicate the same frequency, as stopping potential is related to the frequency of incident light. Different saturation currents indicate different intensities.
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