Das Selen und seine Bedeutung für die Elektrotechnik mit besonderer Berücksichtigung der drahtlosen Telephonie von Ernst Ruhmer - Berlin 1902.
Publisher: Fachzeitschrift ‘Der Mechaniker’, F&M Harrwitz, Berlin, 1902.
64 pp., 49 drawings and photos.
The book offered is the original from 1902. From an estate.
The book is in outstanding condition, see photos.
Selenium is a chemical element (symbol: Se, atomic number 34). It is a grey non-metal.
The name is derived from the Greek Selènè (σελήνη), meaning ‘moon’.
Selenium was discovered in 1817 by Jöns Jacob Berzelius. The Englishman Willoughby Smith discovered in 1873 that selenium has photovoltaic properties, transferring light into electricity. Selenium is also photo-conductive: under the influence of light, the electric conduction strongly increases. It is used for that reason in optical electronics.
Selenium has the remarkable property to transfer light into electricity. The conduction of selenium depends on the amount of light.
- Number of Books
- Das Selen
- Author/ Illustrator
- Ernst Ruhmer
- Book Title
- Das Selen und seine Bedeutung fur die Elektrotechnik
- As new
- Publication year oldest item
- 1st Edition
- Original language
- Der Mechaniker, Berlijn
- 22×16 cm