Surface waves of water: expansion of a disturbance. – It shows a realistic disturbance (caused by shortly dipping a stick into the water) and its expansion forming interfering circles of limited concentricity. The near metallic appearance of the water's surface is due to the small angle of illumination.

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Surface waves of water: expansion of a disturbance. – It shows a realistic disturbance (caused by shortly dipping a stick into the water) and its expansion forming interfering circles of limited concentricity. The near metallic appearance of the water's surface is due to the small angle of illumination.