MCQ
In Young's double slit experiment, when two light waves form third minimum, they have
- APhase difference of $3 \pi$
- BPath difference of $3 \lambda$
- CPhase difference of $\frac{5 \pi}{2}$
- ✓Path difference of $\frac{5 \lambda}{2}$
Path difference is given by $\Delta x=(2 n-1) \frac{\lambda}{2}=\frac{5 \lambda}{2}$
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(Velocity of light = $3 \times {10^8}\,m/s$)