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Concerning the display of digital images: a. The cathode ray tube is dependent on a scanning photon beam b. Over time, cathode ray tubes reliably maintain image quality c. Liquid crystal displays (LCDs) exploit variations in light polarization within the crystal for image visualization d. Once the image is digitized, it is not possible to view it as a hard copy e. Image reproduction is less reliable with flat-panel monitors than with cathode ray tubes |
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Answer» a. False. It is a scanning electron beam, which is directed at a phosphor, which produces the visible image. The intensity of the beam is varied, depending on the input of the signal. b. False. After prolonged use, the image quality degrades, e.g. loss of contrast and problems with the phosphor. c. True. The crystals vary in their degree of polarization when a voltage is placed across them. Each pixel can therefore be manipulated to vary the level of light transmission depending on the input of the signal to that pixel. The resultant image is a summation of all of the pixels. d. False. A hard copy may still be obtained using a laser hardware image. e. False. |
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