Two springs are connected, one is a heavy (i.e., more massive) spring and the ot

Question

Two springs are connected, one is a heavy (i.e., more massive) spring and the other is a light spring. A pulse is travelling down spring A, towards a junction with spring B. The junction itself is small and has basicaly no effect on the wave propagation. Below are statements about relection and transmission at the junction. Which of the statements are true? (Give ALL correct answers, i.e., B, AC, BCD...)

A) If spring A is the heavy spring then the reflected pulse will be inverted.

B) If spring A is the light spring then the reflected pulse will travel slower than transmitted pulse.

C) If spring A is the light spring then the transmitted pulse will be inverted.

D) The only case in which there will be no reflected pulse is when the springs are identical.

E) If spring A is the heavy spring then the transmitted pulse will be inverted.

Explanation / Answer

E) If spring A is the heavy spring then the reflected pulse will be inverted..

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