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.
Welder's Glass. Welder's Shade Glass. A heat resistant grey-green tinted glass made to provide the correct eye protection for every welding operation. The shade numbers 1-14 refer to the density needed for the different welding operations. The higher the number, the darker the shade. Stock sheet size is 0.108 thick in Density 3 through Density 14.