MCQ
Two coherent sources separated by distance $d$ are radiating in phase having wavelength $l.$ A detector moves in a big circle around the two sources in the plane of the two sources. The angular position of $n = 4$ interference maxima is given as
- A$\sin ^{-1} \frac{\mathrm{n} \lambda}{\mathrm{d}}$
- ✓$\cos ^{-1} \frac{4 \lambda}{\mathrm{~d}}$
- C$\tan ^{-1} \frac{\mathrm{~d}}{4 \lambda}$
- D$\cos ^{-1} \frac{\lambda}{4 d}$