Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 124
Figure 96. — Principal Points of a Lens. … Object Figure 97.— Construction of Image when Object is beyond 2 F. focus F (because all parallel rays are focused at this point),and the one through the optical center passes on throughthe lens in a straight line (it really zigzags just a little atthe lens). The point at which these two rays meet…
Physics
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