A polychromatic light is used in an experiment on photoelectric effect. The stopping potential

Is related to the mean wavelength

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Is related to the longest wavelength

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Is related to the shortest wavelength

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Is not related to the wavelength.

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Solution

The correct option is C Is related to the shortest wavelength
The stopping potential (Vs) in photoelectric effect related with the incident light frequency $(ν)$ by the following equation:
$e V_{s} = h ν - ϕ$ ,
where $ϕ$ is the work function of the material. So the stopping potential is related to the shortest wavelength or longest frequency.
So, the answer is option (C).

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