What is fringe width?

Two slits in YDSE are placed 2 millimeter from each other. Interference pattern is observed on a screen placed 2m from the plane of slits. What is the fringe width for a light of wavelength 400 nm, what will be the angular fringe width ?

In a double slit experiment, the distance between slits is increased 10 times whereas their distance from screen is halved, then what is the fringe width?

In Young's experiment, the fringe width is 3 mm for a light of wavelength 6000Å . If the entire apparatus is dipped in water of R.I. 3/2 , then what is the change in fringe width?

Two slits in YDSE are placed 2 millimeter from each other. Interference pattern is observed on a screen placed 2 m from the plane of slits. What is the fringe width for a light of wavelength 400 nm?

Two slits in YDSE are placed 2 millimetre from each other. Interference pattern is observedon a screen placed 2 m from the plane of slits. What is the fringe width for a light of wavelength 400 nm?

Two slits in YDSE are placed 2 millimeter from each other. Interference pattern is observed on a screen placed 2m from the plane of slits. What is the fringe width for a light of wavelength 400 nm ?

In Young.s double slit experiment, blue-green light of wavelength 500nm is used. The slits are 1.20mm apart, and the viewing screen is 5.40 m away from the slits. What is the fringe width.

In YDSE, what is the ratio of fringe width for bright and dark fringes ?