In a photo electric experiment when yellow light is used stopping potential is found to be zero. If the yellow light is replaced by blue light, then stopping potential becomes V0. If red light is used in the same experiment the stopping potential would be

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V02

V04

zero

insufficient information to find the stopping potential

answer is C.

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Detailed Solution

Energy of individual photon of red light is less than that of yellow light. So emission of photo electron will not take place.

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