A person blows into open-end of a long pipe. As a result, a high-pressure pulse of air travels down the pipe. When this pulse reaches the other end of the pipe.

Engineering

Physics

Physical Quantities

Question

a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is open

a high-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed

a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is open

a low-pressure pulse starts travelling up the pipe, if the other end of the pipe is closed

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Phase change of $π$ from denser medium and no phase charge from a rarer medium. For sound, the close end of the pipe is a rarer medium and open end is a denser medium.

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