Word: selenium
(lookup in dictionary)
(lookup stats)
Dates: during 1940-1949
Sort By: most recent first
(reverse)
...chief proved or suspected producing agents, as Hueper lists them: physical agents, such as ultraviolet rays; inorganic substances, such as beryllium and selenium; organic chemicals, e.g., benzol; certain by-products from the process of refining oil shale and petroleum; vegetable products, e.g., betel nuts...
...stumbled on the cause: a shaft of sunlight, streaming through the window, fell on an electrical resister and jammed his code receiver. When May passed his hand between the light and the resister, the hum stopped. But why? May decided, rightly and brightly, that the resister (or the selenium that coated it) must have what are now called photoelectric properties; i.e., that it could convert light values into electric values...