The surface of seas and lakes often reflect blue skylight, making them appear bluer. The relative contribution of reflected skylight and the light scattered back from the depths depends strongly on the observation angle. In this view of Crater Lake (Oregon, USA), the far side of the lake reflects the sky more, and the near side shows mostly the actual water.
The blueness of water is very apparent when diving. As one goes deeper, lower energy wavelengths penetrate the water less, eventually leaving only blue light from the higher energy end of the spectrum. Even when using an artificial light source, such as a flash, the objects close to the observer appear as their real color, whereas the objects further away appear to be blue.
The blueness of water is very apparent when diving. As one goes deeper, lower energy wavelengths penetrate the water less, eventually leaving only blue light from the higher energy end of the spectrum. Even when using an artificial light source, such as a flash, the objects close to the observer appear as their real color, whereas the objects further away appear to be blue.
The blueness of water is very apparent when diving. As one goes deeper, lower energy wavelengths penetrate the water less, eventually leaving only blue light from the higher energy end of the spectrum. Even when using an artificial light source, such as a flash, the objects close to the observer appear as their real color, whereas the objects further away appear to be blue.
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