The centre of inteference pattern

The distance of n^(th) minima from the centre of interference pattern is

The distance of the 10th dark band from the centre of interference pattern is 28.5 mm. the band width is

In interference of light, beta is fringe width. The distance of n^(th) maxima from the centre of interferene pattern is

In Young's experiment the distance between the nth fringe on one side of centre of an interferene pattern and (n+1)^(th) dark fringe on its other side will be

The distance of n^(th) bright fringe from the centre of the interference pattern is

In a biprism experiment, the distance of the 20th bright band from the centre of the interference pattern is 8 mm. The distance of the 30th bright band from the centre is