IN accurate measurements of focal-lengths and the like, on an optical bench, it is customary to employ the points of pins mounted on adjustable stands. The lens under test has itself to be so mounted ...
THE thirteenth Duddell Medal of the Physical Society was presented on February 7 to Dr. C. V. Drysdale, who is distinguished for his outstanding work in connexion with electrical and optical ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results