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The solar eclipse of December 26, 2019 seen through a pair of solar eclipse glasses in Jaffna, Sri Lanka. A cat demonstrating a pair of eclipse glasses. Solar viewers (also known as solar viewing glasses or solar eclipse glasses) are special eyewear designed for direct viewing of the Sun. Standard sunglasses are unable to filter out eye ...
Solar Eclipse Glasses with Photo Filter (10-Pack) The American Astronomical Society lists Kesseph as a trusted North American importer. Unlike others on this list, it packages its solar eclipse ...
These glasses are independently tested and are shown to filter 100% of harmful UV and infrared light, and 99.9% of intense visible light. This 10 pack is great for splitting among friends or a ...
Inuit snow goggles function by reducing exposure to sunlight, not by reducing its intensity. Since the 13th century and until the spread of contemporary UV-shielding spectacles against snowblindness, Inuit made and wore snow goggles of flattened walrus or caribou ivory with narrow slits to look through to block almost all of the harmful reflected rays of the sun.
Pet parenting just entered its tech era, and your fur baby's living their best analog life while others are going digital. We've rounded up 25 genius gadgets that transform basic pet care into ...
Experiments were made with human sunglasses and sports goggles before a pair was developed to fit the shape of a dog's head. [1] They are now produced by the Doggles Company in Diamond Springs, California. [2] Doggles are constructed out of a tinted polycarbonate material for UV protection, with elastic straps to secure them to the dog's head. [3]
In another sort of technology, organic photochromic molecules, when exposed to ultraviolet (UV) rays as in direct sunlight, undergo a structural change that causes them to absorb a significant percentage of the visible light, i.e., they darken. Plastic photochromic lenses use oxazines and naphthopyrans to achieve the reversible darkening effect ...
Uncoated glasses lens (top) versus lens with anti-reflective coating. The reflection from the coated lens is tinted because the coating works better at some wavelengths than others. An antireflective , antiglare or anti-reflection ( AR ) coating is a type of optical coating applied to the surface of lenses , other optical elements, and ...