| 释义 |
le·nard rays
\ˈlāˌnärt-, ləˈnärd-\ noun plural
Usage: usually capitalized L
Etymology: after Philipp Lenard died 1947 German physicist
: a mixture of cathode rays that have emerged from a vacuum tube into the outside space through a window consisting of a piece of thin metal foil and rays emitted by the foil as a result of the incidence of the cathode rays |