waves

Question: Equation of a progressive wave is given by $y=0.2\cos \pi \left( 0.04t+.02x-\frac{\pi }{6} \right)$. The distance is expressed in cm and time in second. What will be the minimum distance between two particles having the phase difference of $\pi /2$



1) 4 cm
2) 8 cm
3) 25 cm
4) 12.5 cm
Solution: Explanation: No Explanation
Progressive Waves

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