Aditya and Millie consider the case in which three ropes are joined together, an

Question

Aditya and Millie consider the case in which three ropes are joined together, and ?1 = ?3, with ?2 < ?1. In other words, the two end pieces have the same linear density, and the piece joining the two has a lower linear density. How does Aditya describe what happens when a pulse is sent through the ropes, beginning at the free end of rope 1?

Not ready to quit, Aditya and Millie consider the case in which three ropes are joined together, and H1 H3. with H2 u2, no pulse is transmitted or reflected "The incident pulse moves through rope 1. When it strikes the boundary between it and rope 2, it is partially reflected and partially transmitted. In this case, the transmitted pulse has a smaller amplitude than the original pulse. The transmitted pulse strikes the boundary between rope 2 and rope 3, where the pulse is again partially transmitted and partially reflected The reflected part of the pulse is inverted. This inverted pulse then strikes the boundary between ropes 1 and 2, where it again is partially reflected and partially transmitted. The reflected pulse is again inverted, and so On "The incident pulse moves through rope 1. When it strikes the boundary between it and rope 2, it is partially reflected and partially transmitted. In this case, the transmitted pulse has a larger amplitude than the original pulse. The transmitted pulse strikes the boundary between rope 2 and rope 3, where the pulse is completely reflected and inverted The inverted pulse then strikes the boundary between ropes 1 and 2, where it again is partially reflected and partially transmitted. The reflected pulse is again inverted, and so on." "The incident pulse moves through rope 1. When it strikes the boundary between it and rope 2, it is partially reflected and partially transmitted. In this case, the transmitted pulse has a larger amplitude than the original pulse. The transmitted pulse strikes the boundary between rope 2 and rope 3, where the pulse is again partially transmitted and partially reflected The reflected part of the pulse is inverted. The inverted pulse then strikes the boundary between ropes 1 and 2, where it again is partially reflected and partially transmitted. The reflected pulse is again inverted, and so On

Explanation / Answer

FOURTH OPTION --- is correct

"The incident pulse moves through rope 1. When it strikes the boundary between it and rope 2, it is partially reflected and partially transmitted. In this case, the transmitted pulse has a larger amplitude than the original pulse. The transmitted pulse strikes the boundary between rope 2 and rope 3, where the pulse is again partially transmitted and partially reflected The reflected part of the pulse is inverted. The inverted pulse then strikes the boundary between ropes 1 and 2, where it again is partially reflected and partially transmitted. The reflected pulse is again inverted, and so on"

Explanation - when a pulse move from denser medium to rarer it is partially reflected and partially transmitted. In this case, the transmitted pulse has a larger amplitude than the original pulse while when the pulse move from a rarer medium to denser the pulse is again partially transmitted and partially reflected but the reflected part of the pulse is inverted.

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