Hall, Edwin Herbert, 1855-1938 · New York, H. Holt and company · leaf 133
seen. Thus, the small objects which are to be looked at with amicroscope need to be brightly illuminated, and a concavemirror is commonly used to throw light upon them. 123. The Ophthalmoscope.—Often a physician wishes tosee what is wrong in the depthsof a patients eye. To do thistfie interior of… … REGULAE REFLECTION OF LIGHT. 121 ophthalmoscope, Fig. 84, where M is a curved mirror witha hole in the centre; L is some source of light, placed sothat the rays proceeding from it to the mirror pass by re-flection into the eye of the patient, represented by E\ and0 marks the position of the…
Physics
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