Typical examples are poking a hole in the snow and looking down into the hole to see blue light or the blue color associated with the depths of crevasses in glaciers. In each case the blue light is the product of a relatively long travel path through the snow or ice. So the spectral selection is related to absorption, and not reflection as is sometimes thought. In simplest of terms, think of the ice or snow layer as a filter. If it is only a centimeter thick, all the light makes it through, but if it is a meter thick, mostly blue light makes it through. 395 Fact Credit: National Snow and Ice Data Center NSIDC The National Snow and Ice Data Center
Source of Fluoride and Flavonoids. Drinking unsweetened iced tea also helps increase your fluoride intake and provides beneficial flavonoids. An 8-ounce portion of brewed black iced tea contains up to 0.5 milligrams of fluoride, and making your iced tea with fluoridated water can increase your fluoride intake further.
All of Dunkinâ Donutsâ delicious freshly brewed Iced Teas are made-to-order, unsweetened or sweetened. With five calories per 16 ounce serving, a small Dunkin' Donuts unsweetened Iced Tea also offers a crisp, cold and convenient better-for-you beverage option.