Deepak Scored 45->99%ile with Bounce Back Crack Course. You can do it too!

# The linewidth of a bright fringe is sometimes defined

Question:

The linewidth of a bright fringe is sometimes defined as the separation between the points on the two sides of the central line where the intensity falls to half the maximum. Find the linewidth of a bright fringe in a Young's double slit experiment in terms of $\lambda, d$ and D where the symbols have their usual meanings.

Solution: