S is the size of the slit, d is the sepa...

S is the size of the slit, d is the separation between the slits and D is the distance of slits from a plane where Young's double slit interference pattern is being observed . If `lamda` be the wavelength of light, then for sharp fringes, the essential conditional is

`S/Dltlamda/d`

`S/Dgtlamda/d`

`SlamdaltdD`

`SDgtlamdad`

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DISHA PUBLICATION-WAVE OPTICS-EXERCISE-1 : CONCEPT BUILDER

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