f object and mounting medium. With such images thediaphragm should not be too large (see ji 79). 50 LIGHTING AND FOCUSING. \CH. II. If the color and refractive index of the object were exactly like the mountingmedium it could not be seen. In most cases both refractive index and color… … 53- N. 54- N. 55- Figs. 53-55.— Diagrams illustrating refraction in different media and at planeand curved surfaces. In each case the denser medium is represented by line shad-ing and the perpendicular or normal to the refracting surface is represented by thedotted line N-N\ the refracted ray by…
Microscopy
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