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A person blows into open- end of a long ...

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

A

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

B

(b)a low-pressure pulse starts traveling up the pipe, if the other end of the pipe is open

C

(c)a low-pressure pulse starts traveling up the pipe, if the other end of the pipe is closed

D

(d)a high-pressure pulse starts traveling up the pipe, if the other end of the pipe is closed

Text Solution

Verified by Experts

The correct Answer is:
B, D
Reflection from open end creates a phase difference of `pi` so high presure wave returns as low presure wave Reflection from closed end does not create any phase difference.so high pressurewave remains a high pressure wave on reflection .
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