How does fringe width vary with wave length?

How does fringe width vary with distance between the double slit and the screen?

How does fringe width vary with slit separation?

In the doble slit experiment the fringe width with light of wave length lambda is 0.150 mm. What is the minimum width of each slit so that the interference pattern is visible ?

What is fringe width?

How does the fringe width of interference fringes change, when the whole apparatus of Young's experiment is kept in a liquid of refractive index 1.3 ?

How does the fringe width of interfernce fringe change, when the whole apparatus of Young's experiment is kept in a liquid of refractive index 1.3?

How does the fringe width of interference fringes change, when the whole apparatus of Young's experiment is kept in a liquid of refractive index 1.3 ?