Influence
It was observed that under some conditions the glass envelope would itself glow at the positive (anode) end. This glow was attributed to the transmission of a ray from the negative cathode at the opposite end of the device, and so were named cathode rays. William Crookes developed a modification of the Geissler tube into what is known as the Crookes tube to demonstrate and study these rays, later determined to be a stream of electrons. This device was further developed into the cathode ray tube with applications in electronics development and diagnosis, and in radar and television displays.
Geissler tubes have had a large impact on the development of many instruments and devices all of which use related vacuum and discharge principles.
- Xenon flash lamps (for flash photography),
- Xenon arc lamps (for automobile headlights),
- X-ray tubes,
- sodium vapor lamps of low and high pressure,
- "Neon" signs (both using visible light discharge from neon and other gases and indirectly through phospor excitation from ultraviolet light)
- Mercury vapor lamps,
- Mass spectrometry devices,
- Cathode ray tube (employed in the oscilloscope and later as a television, radar, and computer display device),
- Electrotachyscope (an early moving picture display device), and
- Fluorescent lamps.
Read more about this topic: Geissler Tube
Famous quotes containing the word influence:
“The woman who can’t influence her husband to vote the way she wants ought to be ashamed of herself.”
—E.M. (Edward Morgan)
“Books, the oldest and the best, stand naturally and rightfully on the shelves of every cottage. They have no cause of their own to plead, but while they enlighten and sustain the reader his common sense will not refuse them. Their authors are a natural and irresistible aristocracy in every society, and, more than kings or emperors, exert an influence on mankind.”
—Henry David Thoreau (1817–1862)
“Mothers have as powerful an influence over the welfare of future generations, as all other causes combined.”
—John Abbott. The Mother at Home; or the Principles of Maternal Duty, John Abbott, Crocker and Brewster (1833)