Carhart, Henry S. (Henry Smith), 1844-1920 · Boston : Allyn and Bacon · leaf 293
So alsothe two corresponding rays from B emerge from the lensas if they came from b. Hence a and b are virtual fociand ab is the virtual image of AB. In this case objectand image are on the same side of the optical centre. 282 LIGHT. 2O3. Construction for the Image in a Diverging Lens.— The images… … Fig. 142. principal axis after emerging from the lens diverge .fromthe axis as if they came from the principal focus F. Theirdirections produced backwards intersect the other tworays along the secondary axis in a and b respectively.Hence ab. is the virtual image of AB. 2O4. Spherical Aberration and…
Physics
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