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The equation of a plane wave travelling ...

The equation of a plane wave travelling along positive direction of `x-`axis is `y = asin"(2pi)/(lambda)(vt-x)` When the wave is reflected at a rigid surface and its amplitude becomes `80%`, then find the equation of the reflected wave.

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The correct Answer is:
`y' = 0.8 a sin (2pi)/(lambda) (vt + x + (lamda)/(2))`.
(a) `a_(Net) = 0`
(b) `a_(Net) = a_(1) + a_(2) = 0.15 + 0.15`
`= 0.3`
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RESONANCE-TRAVELLING WAVES-Exercise- 1 PART I
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