What causes fringe spacing to increase?

Increasing the wavelength of the light increases the spacing between different fringes since the spacing between different fringes is wavelength dependent.

How does the fringe width of interference fringes changes with increase in distance between the slits?

( c) When separation between slits is increased, d increases. Therefore fringe width β decreases. As source slit is brought closer to double slit plane, S decreases, teh interference pattern gets less and less sharp.

What happens when you increase the number of slits?

Increasing the number of slits not only makes the diffraction maximum sharper, but also much more intense. As the intensity increases, the diffraction maximum becomes narrower as well as more intense.

What is fringe spacing?

The distance between any two consecutive bright fringes or two consecutive dark fringes is called fringe spacing. Fringe spacing or thickness of a dark fringe or a bright fringe is equal. It is denoted by Dx. Consider bright fringe.

What is the spacing between adjacent fringes?

The distance between adjacent fringes is Δy=xλd Δ y = x λ d , assuming the slit separation d is large compared with λ.

What are the factors on which fringe width of interference fringes depend?

Answer: The wavelength of light, distance between the slits and the screen or slit separation.

How does number of slits affect intensity?

As the number of slits is increased, the intensity of the principal maxima increases and the width decreases.

What happens to diffraction pattern when distance between slits within the grating is increased?

What happens to the diffraction pattern when the distance between slits within the grating is increased? When the distance between slits within the grating is increased, bands get closer together and eventually merge to form an image of the grating.

Is Fringe width the same as fringe separation?

Believing that your text book is correct in saying that fringe separation as the distance between the centers of adjacent bright or dark fringes (in double slit experiment) from the center of the screen, my textbook defines fringe width as the same (by the formula of fringe width).