Question
In Young’s double slit experiment, if the distance between the slits be less than $\lambda(\text{i.e.,d<}\lambda)$ what will be the effect on interference fringes?
✓
Answer
Fringe with $\beta=\frac{\text{D}\lambda}{\text{d}},\text{if d}<\lambda,$ so no fringe will be observed in region of visibility.
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