Question

In Young's double slit experiment, the phase difference between the light waves reaching third bright fringe from the central fringe will be ($\lambda =6000\mathring{A}$)

• A. $0$
• B. $2\pi$
• C. $4\pi$
• D. $6\pi$

Answer 1

The correct option is D $6\pi$

$\because n=3\therefore 2n\pi =2\times 3\times \pi =6\pi$