Q 1541112923.     In the figure shown `S_O - S_2O = S_3O - S_2O = 4`· Intensity at `O` due to any one of the slits is `I_0` . What is the intensity due to all the three coherent sources `s_1, s_2` and `s_3` ?

A

`3l_0`

B

`l_0`

C

`5l_0`

D

`9l_0`

HINT

`Delta phi = (2 pi)/lambda * Delta x`
0
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