Among metals, osmium has the maximum optical emission rate. Consequently, after Edison’s carbon filaments, osmium was used at the beginning of the lamp sector. The main drawback of this metal is its ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Irving Langmuir received a Ph.D. in ...

IN practical work, the term ‘blended light’ is used to describe the mixture of the light from the ordinary tungsten gas-filled lamps with that from mercury discharge lamps. A. H. Olsen contributes a ...

The SaVi SHO floodlight can deliver up to 16 million programmable colors (as well as various shades of white) at up to 1,400 lm for an output that not only rivals tungsten or halogen emitters, but ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...