In a Young double slit interference experimentthe fringes pattern is observed on a screen placed at a distanceD from the slits . The slits areseparatedby a distance d and are illuminated by monochromaticlight of wavelength lambda. Find the distance from the central point where the intensity fallsto(a) half the maximum(b) on fourthof the maximum.

In a Young double slit interference experimentthe fringes pattern is o

1.	In a Young double slit interference experimentthe fringes pattern is observed on a screen placed at a distanceD from the slits . The slits areseparatedby a distance d and are illuminated by monochromaticlight of wavelength lambda. Find the distance from the central point where the intensity fallsto(a) half the maximum(b) on fourthof the maximum.
Answer» `(Dlambda)/(4D),(Dlambda)/(3D)` `(Dlambda)/d,(Dlambda)/(2D)` `(Dlambda)/d , (Dlambda)/(2d)` `(Dlambda)/(4d),(Dlambda)/d` ANSWER :A

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