 | Elroy McKendree Avery - 1878 - 480 pages
...magnifyingglass, or simple microscope, is a convex lens, generally doubleconvex. The object is placed between the lens and its principal focus. The image is virtual, erect and magnified (Fig312). The visual angle subtended by the image is greater than that subtended by the object... | |
 | Henry Smith Carhart, Horatio Nelson Chute - 1912 - 472 pages
...converging lens, no distinct image is formed (Fig. 237). Fig. 237 V. When the object is between a converging lens and its principal focus, the image is virtual, erect, and enlarged (Fig. 238). Fig. 238 VI. With a diverging lens, the image is always virtual, erect, and smaller than the... | |
 | Henry Smith Carhart, Horatio Nelson Chute - 1917 - 572 pages
...converging lens, no distinct image is formed (Fig. 267). B LIGHT V. When the object is between a converging lens and its principal focus, the image is virtual, erect, and enlarged (Fig. 268). FIGURE 268. — • OBJECT LESS THAN FOCAL LENGTH FROM LENS. VI. With a diverging lens, the image... | |
| |
... focal length, the image is real, inverted, at a distance of more than twice the focal length, and larger than the object (Fig. 