Wright, Mark R., 1854- · London : Longmans · leaf 131
Fig. The Magic Lantern.—This instrument illustrates the usesof mirrors and lenses. A lamp-flame is placed, at the focus ofa mirror m ; thus all reflected rays are parallel; these rays meet … Fig. III. the convex lens L, called the condenser, and converge the raysto the focus of L. The movable lens m, called the objective,whether single or made of two lenses, acts like one convex lens.The converging rays pass through the slide ab; ab is nearer Refraction of Light—Lenses 123 to m than…
Physics
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