The Fluoroscope
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-515
2025-12-23
595
a form of fluorescent screen, was devised by Edison in order that he might study the effect of the Röntgen rays without the use of photographic platcs. It consists of a screen covered with crystals of calcium tungstate and fixed to a boxlike support with opaque sides which, opposite the screen, fit so closely around the eyes that they cut off all outside light. By means of the fluoroscope a person may examine, for instance, the bones of his own hand by putting it before the screen and looking through the screen toward a tube that is giving off X-rays.
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