Photo-Electricity (Classic Reprint)

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Excerpt from Photo-Electricity It may seem somewhat strange that ionisation-by ultra-violet light manifests itself as a surface effect in solids and liquids, while ionisation by almost all other agents appears most evident in gases. Yet there is no fundamental distinction on this account. Ultra-violet light - provided extremely Short wave-lengths are used - does ionise gases just as readily as X-rays. But with the ordinary sources Of ultra-violet light, the surface effect is the only one Observed, and the methods, Of investigating it differ considerably from the methods employed in studying gaseous ionisation. 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.