What type of interference produces a dark fringe pattern on the screen?

destructive interference
The dark fringes on either side of the zero-order fringe are caused by destructive interference. Light from one slit travels a distance that is ½ wavelength longer than the distance traveled by light from the other slit.

What happens to the distance between interference fringes?

The spacings between different fringes decreases as the distance between the slits increases because it is dependent on L. Increasing the wavelength of the light increases the spacing between different fringes since the spacing between different fringes is wavelength dependent.

What pattern will show on the screen if white light is used in interference phenomenon?

Therefore, if monochromatic light in Young’s interference experiment is replaced by white light, then the waves of each wavelength form their separate interference patterns The resultant effect of all these patterns is obtained on the screen. Therefore, the central fringe is white.

Why dark and bright fringes are formed alternatively in interference pattern?

The bright fringe in the middle is caused by light from the two slits traveling the same distance to the screen; this is known as the zero-order fringe. The dark fringes on either side of the zero-order fringe are caused by light from one slit traveling half a wavelength further than light from the other slit.

How are dark fringes formed?

The dark fringes are formed due to destructive interference. The condition for destructive interference is that the phase difference between the two waves must be an odd multiple of π and the path difference between the two waves is equal to an odd multiple of λ/2. …

Can photons produce interference?

But light isn’t just a wave—it’s also a particle called a photon. Turns out, even though there’s only one photon, it still forms an interference pattern. It’s as if the photon travels through both slits simultaneously.

On what factor does the contrast in the fringes in any interference pattern depends?

Wavelength. Intensity ratio of the sources.