Luminous efficiency of phosphorus glow
✍
E.Q. Adams
📂
Article
📅
1924
🏛
Elsevier Science
🌐
English
⚖ 73 KB
from the radiometer by a water diaphragm and the radiation from the arc after passing through the 8 mm. fused quartz plate and the four sheets of black paper was brought to a focus upon the radiometer vanes by a concave mirror. The carbon arc in air alone gave small positive deflections. When mercu