Two identical sinusoidal waves are moving in the same direction along a stretched string and interfere with each other. The phase difference between them is $120^{\circ}$. The amplitudes of both the waves are the same. If the amplitude of the resultant wave due to interference is $2 \,mm$, the amplitude of each wave is:
- A$1 \,mm$
- B$2 \,mm$
- C$\sqrt{3} \,mm$
- D$2 \sqrt{3} \,mm$
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DifficultJEE MAIN 2021
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