Question

White light is used to illuminate the two slits in Young's double slit experiment. The separation between the slits and the screen is at a distance $(d>D)$ from the slits. At a point on the screen directly in front of one of the silts, certain wavelengths are missing. Some of these missing wavelength are

Answer 1

Missing wavelength at $P$,

$\lambda =\frac{d^2}{(2n-1)D}$

putting $1,2.3,.....$ value of $n$

Find missing wavelength

Missing $\lambda =\frac{d^2}{D},\frac{d^2}{3D},\frac{d^2}{5D},......$