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:
“Imagination is always the fabric of social life and the dynamic of history. The influence of real needs and compulsions, of real interests and materials, is indirect because the crowd is never conscious of it.”
—Simone Weil (1909–1943)
“To marry a man out of pity is folly; and, if you think you are going to influence the kind of fellow who has “never had a chance, poor devil,” you are profoundly mistaken. One can only influence the strong characters in life, not the weak; and it is the height of vanity to suppose that you can make an honest man of anyone.”
—Margot Asquith (1864–1945)
“They tell us that women can bring better things to pass by indirect influence. Try to persuade any man that he will have more weight, more influence, if he gives up his vote, allies himself with no party and relies on influence to achieve his ends! By all means let us use to the utmost whatever influence we have, but in all justice do not ask us to be content with this.”
—Mrs. William C. Gannett, U.S. suffragist. As quoted in History of Woman Suffrage, vol. 5, ch. 8, by Ida Husted Harper (1922)