In Young's double slit experiment, $5^{th}$ dark fringe is formed opposite to one of the slits. If $D$ is the distance between slits and the screen, and $d$ is the separation between the slits, then the wavelength of light used is ?

Q.

While light is used to illuminate the two slits in Young's double slit experiment. The separation between the slits is d and the distance between the screen and the slit is D (>> d). At a point on the screen directly in front of one of the slits, certain wavelengths are missing. The missing wavelengths are (here m=0, 1, 2, .....is an integer)

Q. White light is used to illuminate the two slits in a Young's double slit experiment. The separation between the slits is d 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 slits, certain wavelengths are missing. Some of these missing wavelengths are :

Q. The fringe width $\beta$ of the fringes produced in Young's double slit experiment conducted for monochromatic light of wavelength $\lambda$ with slit difference $d$ and separation between slits and screen $D$ is :

Q. In Young's double slit experiment, if the separation between slit plane and screen is doubled and the wavelength of coherent light used in two slits is halved, then fringe width -