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Search Results for “Image tube (astronomy)”
 
 
1) periscope. The Columbia Encyclopedia, Sixth Edition. 2001
...Its essential parts are a tube, prisms, lenses, mirrors, and an eyepiece. The image is received in one mirror and reflected through the tube with its lenses to a...

2) cathode-ray tube. The Columbia Encyclopedia, Sixth Edition. 2001
...The beam of electrons leaves a bright spot wherever it strikes the phosphor screen. To form a display, or image, on the screen, the electron beam is deflected in...

3) telescope. The Columbia Encyclopedia, Sixth Edition. 2001
...Traditional optical telescopes, which are the subject of this article, also are used to magnify objects on earth and in astronomy; other types of astronomical telescopes...

4) Farnsworth, Philo Taylor. The Columbia Encyclopedia, Sixth Edition. 2001
...Philo Taylor, 1906-71, American inventor, b. Beaver, Utah, grad. Brigham Young Univ., 1925. He demonstrated (1927) a working model of a television system. His "dissector...

5) photoelectric cell. The Columbia Encyclopedia, Sixth Edition. 2001
...The most common type consists of two electrodes separated by a light-sensitive semiconductor material. A battery or other voltage source connected to the electrodes...

6) spectroscope. The Columbia Encyclopedia, Sixth Edition. 2001
...When a material is heated to incandescence it emits light that is characteristic of the atomic makeup of the material. In the original spectroscope design in the...

7) television. The Columbia Encyclopedia, Sixth Edition. 2001
...Television has become a major industry, especially in the industrialized nations, and a major medium of communication and source of home entertainment. Television...

8) CAT scan. The Columbia Encyclopedia, Sixth Edition. 2001
...More recent scanners have a stationary X-ray tube and use deflecting coils and special reflectors to position the X-ray beam. A computer program is then used to form...

9) kaleidoscope. The Columbia Encyclopedia, Sixth Edition. 2001
...Invented by the Scottish physicist Sir David Brewster in 1816, the device is usually a hand-held tube, a few inches to as much as twelve feet in length, and looks...

10) X ray. The Columbia Encyclopedia, Sixth Edition. 2001
...Production of X RaysAn important source of X rays is synchrotron radiation. X rays are also produced in a highly evacuated glass bulb, called an X-ray tube, that...

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