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प्रश्न
How does every point on the surface of a calm pool respond after a small stone is dropped into it?
विकल्प
It becomes a point source at a large distance.
It starts oscillating with time.
It forms a ray normal to the surface.
It remains at a constant amplitude.
MCQ
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उत्तर
Every point on the water surface starts oscillating with time. The disturbance spreads outwards from the point of impact.
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