MCQ
If two waves of same frequency and same amplitude respectively, on superimposition produced a resultant disturbance of the same amplitude, the waves differ in phase by
- A$\pi$
- ✓$2 \pi / 3$
- C$\pi / 2$
- DZero
✓
Answer
Correct option: B.
$2 \pi / 3$
(b) $A^2=a^2=a^2+a^2+2 a^2 \cos \theta \Rightarrow \cos \theta=-\frac{1}{2} \Rightarrow \theta=\frac{2 \pi}{3}$
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