Laurence, Lionel · London, School of Optics · leaf 142
which is held 130 GENEKAL AND PRACTICAL OPTICS with its base directed towards A, while the edge points to B. If the line A Bis displaced upwards or downwards the prism must be rotated in a plane parallelto the card until A B is continuous and seen unbroken through the prism.The base-apex line is… … 14 1413 12 111° 9 8 7 6 5 4 3 2 1 t Y v I -=53 Fig. 132. Fig. 133. of the prism in degrees of deviation, prism diopters or degrees, according towhich notation the scale is arranged for. The prism must be held sufficientlylow so that the numbers on the scale may be seen over the top of the…
Optics
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