Ruler and lens Small 320×197 Medium 640×394 Large 1024×631 Download Tiff Original 2400×1478 | (533.5 KB) Description Ruler and with a lens and screen, used for demonstrating refraction. Keywords light, optic, refract, Ruler, screen Galleries Miscellaneous Optics Source: Elroy M. Avery School Physics (New York: Sheldon and Company, 1895) 366
