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Physics Wave and Sound General MCQ (Single Correct)

A cylindrical tube, open at one end and closed at the other, is in acoustic unison (resonance) with an external source of sound of single frequency held at the open end of the tube, in its fundamental note. Then:

A
the displacement wave from the source gets reflected with a phase change of π at the closed end
B
the pressure wave from the source get reflected without a phase change at the closed end
C
the wave reflected from the closed end again gets reflected at the open end
D
the wave reflected from the closed end does not suffer reflection at the open end

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(a, b, c)

When sound wave is reflected from rigid end displacement wave get extra phase at π and pressure wave get no extra phase So option A, B, C are correct.

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