Equation of a progressive wave is given by $y = a\,\sin \pi \,\left[ {\frac{t}{2} - \frac{x}{4}} \right]\,,$ where $t$ is in seconds and $x$ is in meters. The distance through which the wave moves in $8 sec$ is .... $(m)$ (in meter)
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(b) $v = \frac{{{\rm{Co}} - {\rm{efficent}}\;{\rm{of}}\;t}}{{{\rm{Co}} - {\rm{efficent}}\;of\;x}} = \frac{{1/2}}{{1/4}} = 2\,m/s$
Hence $d = v\,t = 2 \times 8 = 16m$
Hence $d = v\,t = 2 \times 8 = 16m$
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