enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Optical coating - Wikipedia

   en.wikipedia.org/wiki/Optical_coating

   For ordinary glass (n≈1.5), the optimum coating index is n≈1.23. Few useful substances have the required refractive index. Magnesium fluoride (MgF 2) is often used, since it is hard-wearing and can be easily applied to substrates using physical vapour deposition, even though its index is higher than desirable (n=1.38). With such coatings ...

3. Abbe number - Wikipedia

   en.wikipedia.org/wiki/Abbe_number

   Values of range from below 25 for very dense flint glasses, around 34 for polycarbonate plastics, up to 65 for common crown glasses, and 75 to 85 for some fluorite and phosphate crown glasses. Most of the human eye's wavelength sensitivity curve, shown here, is bracketed by the Abbe number reference wavelengths of 486.1 nm (blue) and 656.3 nm (red)

4. Poly(methyl methacrylate) - Wikipedia

   en.wikipedia.org/wiki/Poly(methyl_methacrylate)

   It has a density of 1.17–1.20 g/cm 3, [1] [16] which is approximately half that of glass, which is generally, depending on composition, 2.2–2.53 g/cm 3. [1] It also has good impact strength, higher than both glass and polystyrene, but significantly lower than polycarbonate and some engineered polymers.

5. List of refractive indices - Wikipedia

   en.wikipedia.org/wiki/List_of_refractive_indices

   1.4729: Sugar solution, 75%: 1.4774 [20] Poly(methyl methacrylate) (PMMA) 1.4893–1.4899: Halite (rock salt) 1.516: Plate glass (window glass) 1.52 [29] Crown glass (pure) 1.50–1.54: PETg: 1.57: Polyethylene terephthalate (PET) 1.5750: Polycarbonate: 150: 1.60 [30] Crown glass (impure) 1.485–1.755: Flint glass (pure) 1.60–1.62: Bromine ...

6. 3 Best Christmas Items at Lowe’s That Can Be Reused ... - AOL

   www.aol.com/finance/3-best-christmas-items-lowe...

   10 Best Holiday Gifts Under $50 at Costco for Retirees. 13 Winter Clothing Items You Should Buy at Macy's Now. Lowe's and 5 More Companies Set To Raise Prices on These Popular Items Due to Trump's ...

7. Optical glass - Wikipedia

   en.wikipedia.org/wiki/Optical_glass

   Oxide glasses fall into a range of n d from 1.4 to 2.0 and ν d from 20 to 90, with SiO 2 being the oxide glass with the highest contringency and lowest index. Fluoride glasses can go up to ν d >100 and nd<1.4, BeF 2 being the fluoride glass at the highest constringency and lowest index. Chalcogenide glasses have indexes exceeding 2, a large ...