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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a
V02
b
V04
c
zero
d
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.
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