Hall, Edwin Herbert, 1855-1938 · New York, H. Holt and company · leaf 158
142. Formation of the Image in Exercise 24.—The for-mation of the image-points in Exercise 24 is illustrated byFig. 109. One ray from the object-point A follows asecondary axis (§ 137) passing through the centre of thelens, and its direction after leaving the lens is the same asbefore entering it.… … Fig. 109. through the principal focus, /, on the farther side of thelens. The crossing of these two rays at A shows the posi-tion of the image of A. In a similar way B\ the image of i?, is located. 143. Size and Shape of Image.—If a straight line isdrawn from A to B in Fig. 109, we mav call this…
Physics
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