In the Young's double slit experiment a point source of lambda=5000Å is placed slightly off the central axis as shown in the figure-6.127. (a) Find the nature and order of the interference at the point P. (b) Find the nature and other of the interference at O. (c ) Where should we place a film of refractive index mu = 1.5 and what should be its thickness so that maxima of zero order is obtained at O.

In the Young's double slit experiment a point source of lambda=5000Å

1.	In the Young's double slit experiment a point source of lambda=5000Å is placed slightly off the central axis as shown in the figure-6.127. (a) Find the nature and order of the interference at the point P. (b) Find the nature and other of the interference at O. (c ) Where should we place a film of refractive index mu = 1.5 and what should be its thickness so that maxima of zero order is obtained at O.
Answer» Answer :`[(a) 70^(th) " order MAXIMA"; (B) 20^(th) " order maxima;"(C ) t = 20 MUM, " in front of "S_(1)]`

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