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Resonance

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  p-203

2025-11-13

489

When two waves act in the same direction upon a particle, they cause it to vibrate with greater amplitude. The resulting amplitude is the sum of the amplitudes of two waves. Such an effect in sound waves gives rise to a reinforcement of the sound, called resonance.

Demonstration. - Fill a tall glass jar nearly full of water, and get a piece of large glass tubing about a foot long, or the chimney of a student lamp. Hold a sounding tuning fork over the upper end of the tube, and push the lower end into the water, as shown in Fig. 1, until the air in the tube responds to the tone of the fork and strengthens it.