
Originally Posted by
DSM4Life
Lots of alcohol.
Origin:
1250–1300; ME dirt, drit; c. ON drit excrement; cf. OE drītan
The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air.
However, much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue.
Last thing on the list was a statement not a question ; VOID
Yes , Typically, a deeper pool (to some extent) is faster than a shallower pool. A shallow pool carries out a current more efficiently than a deeper pool.