Describe Young's double slit interference experiment and derive conditions for occurrence of dark and bright fringes on the screen. Define fringe width and derive a formula for it .

Show that both dark and Bright fringes have equal width.

In the figure is shown Young’s double slit experiment. Q is the position of the first bright fringe on the right side of O. P is the 11th fringe on the other side, as measured from Q. If the wavelength of the light used is 6000xx10^-10m , then S_l B will be equal to

Derive the condition for bright and dark fringes produced due to diffraction by a single slit .

Derive an expression for fringe width for Bright and Dark bands.

Young's experiment is performed in air and then performed in water , the fringe width

A beam of light consisting of two wavelengths, 650 nm and 520 nm is used to obtain interference fringes in a Young's double-slit experiment. If distance between slit and screen is 1.2 m and distance between two-slits is 2 mm. Find the distance of the third bright fringe on the screen from the central maximum for wavelength 650 nm.

What must be the thickness of a thin film which, when kept near one of the slits shifts the central fringe by 5 mm for incident light of wavelength 5400 A^@ in Young's double slit intereference experiment? The refractive index of the material of the film is 1.1 and the distance between the slits is 0.5 mm.

In Young's double slit experiment what will we observe on the screen when white light is incident on the slits but one slit is covered with a red filter and the other with a violet filter ? Give reasons for your answer .

Define Interference. Derive expression for fringe width in Young' double slit experiment.