in the experiment of verification of reflection of sound, the incident sound is directed along ___
(a) axis of tube.
(b) normal to the axis of the tube.
(c) at an angle of 30 from the axis of the tube.
(d) at an angle of 45 from the axis of the tube.
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(C) 30 degree from the axis of the tube.
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in the experiment of verification of reflection of sound, the incident sound is directed along
an angle of 30 from the axis of the tube
an angle of 30 from the axis of the tube
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