MCQ
A wave is reflected from a rigid support. The change in phase on reflection will be
- A$\pi /4$
- B$\pi /2$
- ✓$\pi$
- D$2\pi $
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Assertion $A$ : Product of Pressure $(P)$ and time $(t)$ has the same dimension as that of coefficient of viscosity.
Reason $R$ : Coefficient of viscosity $=\frac{\text { Force }}{\text { Velocity gradient }}$
Question : Choose the correct answer from the options given below







