Q8 of 36 Page 105

Equation of a plane progressive wave is given by . 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 plane progressive wave is reflected from denser medium to rarer medium.

Amplitude of reflected wave = × 0.6 = 0.4


Since, wave is reflected from denser to rarer medium, there is a phase change in π


= 0.4 sin 2 π


0.4 sin 2 π

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