Lectures on light, delivered in the United States in 1872-'73; with an appendix (1873)
Tyndall, John, 1820-1893 · New York, Appleton · leaf 151
constant. Transferringthe pile to the other image, the deflection of 90° ismaintained; but on turning the spar the needle nowfalls to zero. The reason is manifest. Permittingthe light to pass, we find the luminous disk at somedistance from the pile. We are dealing, in fact, withthe extraordinary… … perimental arrangement, N is the nozzle of the electriclamp, L a converging lens, B the blrefracting spar, andP the thermo-electric pile.) DOUBLE REFRACTION OF HEAT. I47 If time permitted, we might finish this series ofdemonstrations by magnetizing a ray of heat as wemagnetized a ray of light. We…
Optics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
