23P1Q14

14 D

Wave X leads wave Y by $\displaystyle \frac{2\text{ units}}{6\text{ units}}=\frac{1}{3}$ cycle, corresponding to 120°.

Intensity is proportional to amplitude-square.

Ratio of intensities $\displaystyle ={{(\frac{{{A}_{x}}}{{{A}_{y}}})}^{2}}={{(\frac{3}{2})}^{2}}=2.25$

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