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 example of America must be the example, not merely of peace because it will not fight, but of peace because it is the healing and elevating influence of the world, and strife is not. There is such a thing as a man being too proud to fight. There is such a thing as a nation being so right that it does not need to convince others by force that it is right.”
—Woodrow Wilson (1856–1924)
“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)
“Nature has taken more care than the fondest parent for the education and refinement of her children. Consider the silent influence which flowers exert, no less upon the ditcher in the meadow than the lady in the bower. When I walk in the woods, I am reminded that a wise purveyor has been there before me; my most delicate experience is typified there.”
—Henry David Thoreau (1817–1862)