Explain what is observed on the interference pattern fringes in Young’s double experiment when white light is used?

Explain what is observed on the interference pattern fringes in Young’s double experiment when white light is used?

A central white fringe with colored edges is observed.

White light consists of several component colors. The interference pattern is due to overlapping of the different component colors of white light .

At the center of screen, the path difference is zero for all colors. Hence at the center there is a white fringe.

The violet  fringes are  the first fringe on the either side of the central white fringe because the they have the lowest wavelength. The farthest fringe is red

After a few fringes, the fringe pattern become invisible due to much overlapping.

Please subscribe to promote our website. Subscription is free.

Click the subscribe button on the to right of the website  and follow the prompts.