Ralph newlander (5 résultats)

PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000.

PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000.

HRD. Etat : New. New Book. Shipped from UK. Established seller since 2000.

HRD. Etat : New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Etat : New. Print on Demand. This book delves into the fascinating world of selenium cells, devices that exhibit a change in electrical resistance when exposed to light. The author's research, conducted in the early 20th century, explores the potential of these cells for practical applications beyond their established use in photometry. Inspired by Professor E. Snow's suggestion to utilize their sensitivity to light for the automatic operation of relays in lighting circuits, the author embarks on a detailed investigation. The book explores the complex relationship between illumination and current in selenium cells, uncovering the challenges and limitations inherent in their use for this specific purpose. The author meticulously documents the experimental process, employing a variety of techniques to measure and analyze the behavior of these cells under varying conditions. The book provides valuable insights into the fundamental principles governing the conductivity of selenium and its sensitivity to light, demonstrating the intricacies of this scientific field in its early stages of development. Ultimately, the book concludes with a call for further research into the development of more sensitive and practical selenium cells for applications in electrical circuits, paving the way for future advancements in this burgeoning field. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.…