Despite criticism and early technical failures, the taming of liquid hydrogen proved to be one of NASA's most significant technical accomplishments. . . . Hydrogen -- a light and extremely powerful rocket propellant -- has the lowest molecular weight of any known substance and burns with extreme intensity (5,500Â°F).
The Solar Eclipse/Welding Glasses offered at myeyewear2go are ideally suited to any task or situation that involves eye-damaging light, including welding, solar eclipse viewing, and the viewing of direct sunlight. The green athermal shade 14 glass lenses utilized in these frames block over 99% of UV light and 97% of Infrared Radiation.
All of our solar viewing materials are optical density 5 or greater and are CE certified which meets the transmission requirements of scale 12-16 of EN 169/1992. All our eclipse glasses meets the 2012 Transmission Requirements of EN 1836:2005 & AS/NZS 1338.1:1992 for Eclipse filters. (Queensland Directive) Meets the Standard for ISO 12312-2:2015 see less. By Rainbow Symphony SELLER on January 29, 2016.