MCQ
Consider an $YDSE$ that has different slits width, as a result, amplitude of waves from two slits are $A$ and $2A$ , respectively. If $I_0$ be the maximum intensity of the interference pattern, then intensity of the pattern at a point where phase difference between waves is $\phi $ is
- A${I_0}{\cos ^2}\phi $
- B$\frac{{{I_0}}}{3}{\sin ^2}\frac{\phi }{2}$
- ✓$\frac{{{I_0}}}{9}\left[ {5 + 4\,\cos \phi } \right]$
- D$\frac{{{I_0}}}{9}\left[ {5 + 8\,\cos \phi } \right]$
