Wave Pulse Reflection and Transmission in Spring Junctions

[BuBbLeS01]

Homework Statement

Two springs are connected, one is a heavy spring and the other is a light spring. A pulse is traveling down spring A, towards a junction with spring B. Which of the following statements are correct/incorrect.

A. If spring A is the heavy spring then the transmitted pulse will travel slower than reflected pulse.
B. The only case in which there will be no reflected pulse is when the springs are identical.
C. If spring A is the heavy spring then the reflected pulse will be inverted.
D. If spring A is the light spring then the transmitted pulse will not be inverted.
E. If spring A is the light spring then the reflected pulse will not be inverted.

The Attempt at a Solution

A. Correct
B. Correct
C. Incorrect
D. Correct
E. Incorrect

 

[Shooting Star]

By lighter, I assume mass/unit length is lesser. Does your answer to A tally with the formula for the speed of sound? The tension in both springs is the same.

 

[BuBbLeS01]

Ohh yea no that should be incorrect. Are the rest of them right?

 

[Shooting Star]

Seems to be all right.