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2. Fluoride glass - Wikipedia

   en.wikipedia.org/wiki/Fluoride_glass

   Since fluoride glasses have heavier ions than their silica counterpart, there are lower vibration frequencies that correspond to a longer infrared absorption edge. [6] [7] The extrinsic sources of loss come mainly from crystallite scattering and impurity absorption. The main extrinsic source of loss comes from crystallite scattering.

3. Biological effects of high-energy visible light - Wikipedia

   en.wikipedia.org/wiki/Biological_effects_of_high...

   Blue light, a type of high-energy light, is part of the visible light spectrum. High-energy visible light (HEV light) is short-wave light in the violet/blue band from 400 to 450 nm in the visible spectrum, which in artificial narrowband form has a number of proven negative biological effects, namely on circadian rhythm and retinal health (blue-light hazard), which can lead to age-related ...

4. Solar viewer - Wikipedia

   en.wikipedia.org/wiki/Solar_viewer

   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 ...

5. Here’s what can happen when you view an eclipse incorrectly ...

   www.aol.com/news/protect-eyes-during-annular...

   The lenses of solar eclipse glasses are made of black polymer, or resin infused with carbon particles, that blocks nearly all visible, infrared and ultraviolet light, according to The Planetary ...

6. Where to buy solar eclipse glasses and how to know if they're ...

   www.aol.com/lifestyle/solar-eclipse-glasses-2024...

   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 ...

7. Glass - Wikipedia

   en.wikipedia.org/wiki/Glass

   [44] [59] Although generally transparent to visible light, glasses may be opaque to other wavelengths of light. While silicate glasses are generally opaque to infrared wavelengths with a transmission cut-off at 4 μm, heavy-metal fluoride and chalcogenide glasses are transparent to infrared wavelengths of 7 to 18 μm. [60]