Two progressive waves of amplitude each reach the same point with a phase difference of

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

Two progressive waves of amplitude

3\,\text{cm}

each reach the same point with a phase difference of

60^{\circ}

. What is the resultant amplitude at that point? (a)

6\,\text{cm}

(b)

3\sqrt{3}\,\text{cm}

(c)

3\,\text{cm}

(d)

1.5\sqrt{3}\,\text{cm}