"Plano-convex" Quotes from Famous Books
 ... contrivance yet discovered, to measure their thickness, and determine the law according to which the colours varied with the thickness of the film. Newton surmounted this difficulty by laying a double convex lens, the radius of the curvature of each side of which was fifty feet, upon the flat surface of a plano-convex object-glass, and in the way he obtained a plate of air, or of space, varying from the thinnest possible edge at the centre of the object-glass where it touched the plane surface to a considerable thickness at the circumference of the lens. When the light was allowed to fall upon the object-glass, ...
— The World's Greatest Books, Vol IX. • Edited by Arthur Mee and J.A. Hammerton |
