A source of light is placed at a distance of 50 cm from a photocell and the stopping potential is found to be . If the distance between the light source and photocell is made 25 cm, the new stopping potential will be
As we discussed in concept
Stopping Potential /Cut-off Potential -
It is defined as the potential necessary to stop any electron from reaching the other side.
Stopping potential depends on frequency of light and not on intensity since frequency of light remains constant, stopping potential will remain same.
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