Physics - Wave on String Question with Solution | TestHub

An incident wave $\mathrm{y}=\mathrm{A}\sin \left(\mathrm{ax}+\mathrm{bt}+\frac{\pi }{2}\right)$ is (travelling from rarer to denser medium) reflected by an obstacle at $\mathrm{x}=0$ which reduces intensity of reflected wave by 36%. Due to super position a resulting wave consisting of standing wave and travelling wave in the rarer medium is given by $\mathrm{y}=-1.6\mathrm{A}\sin \mathrm{ax}\sin \mathrm{bt}+\mathrm{cA}\cos (\mathrm{bt}-\mathrm{ax})$