Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth. Tide tables can be used to find the predicted times and amplitude (or "tidal range") of tides at any given locale.
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speed of light waves change when they travel in air to aquarium because want's the light hits the water you see bunches of color along with bigger looking objects