A laboratory course in experimental physics (1896)
Loudon, W. J. (William James), McLennan, John Cunningham, joint author · New York and London, Macmillan and Co. · leaf 47
rotation. The instrument is provided with acollimator, at one end of which is anadjustable slit which can be illumi-nated, and at the other there is insertedI a convex lens to cause the rays comingfrom the slit to issue parallel to eachother. There is also a telescope, at-Fis- 28- tached to a… … THE GONIOMETER. 37 Method I. Theory. — In Fig. 29 AD is a beam of parallel light, whichon striking the angle EDF of the crystal at right angles to theedge is broken up into two beams which are reflected along DBand DG. By the laws of reflection, the beam BD has been deviatedfrom its original path…
Physics
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