Function: noun
Date: 1860
: a lens that causes parallel rays (as of light) to come to a focus
converging lens: S light source, L lens, F focal point
Function: noun
Date: 1860
: a lens that causes parallel rays (as of light) to come to a focus
converging lens: S light source, L lens, F focal point
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012