It is partially reflected and partially transmitted. It is almost totally transm

Question

It is partially reflected and partially transmitted.

It is almost totally transmitted. It is almost totally absorbed.

-What happens when it reaches point B?
It is almost totally reflected.

It is partially reflected and partially transmitted.

It is almost totally transmitted.

It is almost totally absorbed.

(b) Is the pulse reflected from point A displaced in the same direction as the incident pulse, or is it inverted?
inverted same direction

What about the pulse reflected from point B?
same direction inverted

Explanation / Answer

For part A, the rope density increases from the thin to the thick rope.

Whenever a wave pulse comes in contact with a new medium it is partially transmitted and partially reflected, so when the incident pulse comes into contact with the thicker rope at point A some will be transmitted through and some will reflect back. So the answer would be... partially reflected and partially transmitted

At point B, the pulse comes into contact with the a non-movable wall. Because the density of the wall is so much more dense than the rope, it can be assumed that almost the entire pulse will be reflected back. So the answer would be... almost totally reflected

For part B
Whenever a pulse enters a more dense medium, the reflected pulse will be inverted. Additionally, reflected by definition means it goes back in the opposite direction of the indcident pulse.

So in both cases, whenever the incident pulse hits point A and point B, the reflected pulse will move in the opposite direction of the incident pulse and be inverted.

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