Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 471
sam. The principle ofconstruction is this: the power of refracting lightpossessed by Canada balsam is less than that possessedby Iceland spar for the ordinary ray, and greater in thecase of the extraordinary ray; in consequence, the ^ordi-nary ray is reflected at the surface of junction, while 448… … Fig. 207.—In.stninient for showing Polarization by Iveflection. there will be only one spot of light on the screen, whichis due to the extraordinary ray, and as in certain posi-tions this no longer passes (for the ordinary ray, whichappears in the place of the extraordinary when thecrystal is used,…
Astronomy · Telescopes
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
