Two identical waves

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

Two identical waves, each of amplitude

3\,\text{mm}

, superpose at a point and produce a resultant wave whose amplitude is again

3\,\text{mm}

. The phase difference between the two waves (in degrees) is (a)

90^{\circ}

(b)

150^{\circ}

(c)

120^{\circ}

(d)

60^{\circ}