A text-book of physics : with sections on the application of physics to physiology and medicine (1902)
Lehfeldt, Robert Alfred, 1868-1927 · London : E. Arnold · leaf 305
294 LIGHT kinds of light as far as possible from one another. It consistsof the following parts (Fig. no): A slit formed by a pair of … Fig. 110. metal jaws moved by a screw to be a convenient distance apart.The length of the slit must be placed accurately vertical, and thebreadth made as small as the intensity of the light employedwill permit. The slit is carried by a tube called the collimator,and at the other end of this is…
Physics
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