In the following arrangement 
mm, 
mm and 
. The work function of the material of the emitter is 2.2 
. The stopping potential 
needed to stop the photo current will be
A
0.9 
B
0.5 
C
0.4 
D
0. 1 
Text Solution
Verified by ExpertsThe correct answer is:
A
As we know in Young’s double slit experiment fringe width 
separation between two consecutive fringe or dark fringes 
Here 
Energy of light incident on photo plate
According to Einstein photoelectric equation,
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