A wave `y_i = 0.3 cos (2.0x - 40t)` is travelling along a string toward a boundary at x=0. Write expressions for the reflected waves if .
(a) the string has a fixed end at x=0 and
(b) The string has a free end at x=0.
Assume SI units.

Answer

A, B, C, D

Explanation

From fixed end there will be a phase change of `pi.`
Further, wave will start travelling in opposite
direction. Hence, `omegat and kx` both will now become
position. From free end there is no change in
phase.