In the figure shown , , a parallel beamof light is incident on the plane of the slits of a Young.s doubleslit experiment. Lightincident on the slit S_(1)passes througha mediumof variablerefractiveindexmu =+ax (where .x. is the distnce from tehplaneof slitsas shown )uptoa distance.l. before fallingon S_(1) . Restof the space is filled with air .If at .O. minima is formed , then the minimum value of the positive constant a ( in terms of l and wavelength lambda in aire is ) is :

In the figure shown , , a parallel beamof light is incident on the pla

1.	In the figure shown , , a parallel beamof light is incident on the plane of the slits of a Young.s doubleslit experiment. Lightincident on the slit S_(1)passes througha mediumof variablerefractiveindexmu =+ax (where .x. is the distnce from tehplaneof slitsas shown )uptoa distance.l. before fallingon S_(1) . Restof the space is filled with air .If at .O. minima is formed , then the minimum value of the positive constant a ( in terms of l and wavelength lambda in aire is ) is :
Answer» `LAMBDA/l ` `lambda/(l^(2))` `(l^(2))/lambda` NONE of these ANSWER :B

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