Equation of a plane progressive wave is given by $y = 0.6\sin 2\pi \left( {t - \frac{x}{2}} \right)$. On reflection from a denser medium its amplitude becomes $2/3$ of the amplitude of the incident wave. The equation of the reflected wave is
Equation of a plane progressive wave is given by $y = 0.6\sin 2\pi \left( {t - \frac{x}{2}} \right)$. On reflection from a denser medium its amplitude becomes $2/3$ of the amplitude of the incident wave. The equation of the reflected wave is
- A
$y = 0.6\sin 2\pi \left( {t + \frac{x}{2}} \right)$
- B
$y = - 0.4\sin 2\pi \left( {t + \frac{x}{2}} \right)$
- C
$y = 0.4\sin 2\pi \left( {t + \frac{x}{2}} \right)$
- D
$y =-0.4\sin 2\pi \left( {t - \frac{x}{2}} \right)$
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