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.
The advantage to the solar cell is that the welder does not have to remember to turn the helmet off after use. For less hazardous types of welding, such as torch brazing, light electric, and spot welding, goggles with a shade of 5.0 can be convenient. Safety glasses equipped with 1.7 to 3.0 lenses also can be useful in situations in which sparks and spatter are not a concern.