MCQ
The phase difference between two $SHM\,\,$ ${y_1}\, = \,10\,\sin \,\left( {10\pi t\, + \,\frac{\pi }{3}} \right)$ and ${y_2}\, = \,12\,\sin \,\left( {8\pi t\, + \,\frac{\pi }{4}} \right)$ at $t = 0.5\,s$ it
- A$\frac {11 \pi}{12}$
- ✓$\frac {13 \pi}{12}$
- C$\pi $
- D$\frac {17 \pi}{12}$
