Q15.8Multiple choice
Equation of a plane progressive wave is given by y = 0.6 sin 2π t − . On reflection from a denser medium its 2 amplitude becomes 2/3 of the amplitude of the incident wave. The equation of the reflected wave is x
- (a)y = 0.6 sin 2π t + 2 Waves x
- (b)y = − 0.4 sin 2π t + 2 x
- (c)y = 0.4 sin 2π t + 2 x
- (d)y = −0.4 sin 2π t − . 2