In Young' experiment, if `X_(mr)` and `X_(mv)` denotes the distances of `m^(th)` red and violet fringe from the central fringe. Then:

In Young's double slit experiment, the phase difference between the light waves reaching third bright fringe from the central fringe will be (lambda=6000Å)

In the Youngs double slit experiment, the distance of pth dark fringe from the central maximum

In young's double slit experiment, the distance of the n-th dark fringe from the centre is

In Young's double slit experiment, the phase difference between the light waves producing the third bright fringe from the central fringe will be ( lamda=6000 Å)

In Young's double slit experiment wave length of light used is 5000 Å and distance between the slits is 2 mm, distance of screen from the slits is 1m. Find fringe width and also calculate the distance of 7^(th) dark fringe from central bright fringe.