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The (two-dimensional) density of graphene is 0.763 mg per square meter. [ citation needed ] Graphene is the strongest material ever tested, [ 7 ] [ 8 ] with an intrinsic tensile strength of 130 GPa (19,000,000 psi ) (with representative engineering tensile strength ~50-60 GPa for stretching large-area freestanding graphene) and a Young's ...
Water absorption increases significantly at 1,450 nm. The 1,530 to 1,560 nm range is the dominant spectral region for long-distance telecommunications (see transmission windows). Mid-wavelength infrared MWIR, IR-C DIN; MidIR. [22] Also called intermediate infrared (IIR) 3–8 μm 37–100 THz 155–413 meV 966–362 K (693–89 °C)