Download or read book Contributions From the Physical Laboratory, Vol. 2 written by University Of Iowa and published by Forgotten Books. This book was released on 2018-02-10 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Contributions From the Physical Laboratory, Vol. 2: Collected Studies and Reports It is interesting, even at the cost of going over Old ground, to speculate upon what is going on in these crystals under light action. The increase in electric action toward the ultra-violet suggests a photo-electric effect. If that is the case then it becomes difficult to account for the maximum that appears in various places toward the red end of the spectrum. In the broad sense it is Of course a photo-electric effect, only in this case it is not limited to the surface -but takes place throughout the body Of the crystal. And it must be remembered that it takes place through the crystal not only in the path of the light, but the action spreads to a distance, as we have already shown,2 even going from the tip of a spine down into and through the main stem Of a crystal cluster. If we are dealing here with the ordinary photo-electric effect, then we should find, when we proceed into the ultra-violet, no maximum whatever, but rather a steady increase in sensibility. It may be that there is a fundamental curve for the light-electric effect on the basis Of Planck's theory which will Show a steady increase in proceeding from the long to the Shortwave-lengths, and that the various maxima found in between will find their explanation in the common optical properties Of these crystals, such as selective absorption, selective transmission, body color, etc. The fact that these peculiar maxima have thus far made their appearance in the red region of the spectrum, coupled with the fact that the color transmitted through these crystals is reddish in color may be of importance in the final solution. Work along this line is to be prosecuted at once. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.