A pulse in spring L is moving to the right as shown in first diagram below. A short time later, a reflected pulse and a transmitted pulse will travel away from the junction and toward the walls. The transverse displacements of the springs have been exaggerated for clarity. Sketch the shape of the springs at an instant before the transmitted and reflected pulses reach the walls in the following cases:
(1) the wave speed in spring R is less than the wave speed in spring L, and
(2) the wave speed in spring R is greater than the wave speed in spring L. Your drawings should be qualitatively correct; however, you are not expected to show the correct relative amplitudes of the pulses.
