Wright, Mark R., 1854- · London : Longmans · leaf 114
an image upon ascreen ; the screen is not essential, if we stand so that theimage is between our eye and the mirror, and about a footaway, it can still be seen in mid-air, when we remove the screenof tissue-paper. The image is real, and with a hand-lens wecan magnify it. Move the candle from the… … Fig. 81. Whenever a real image is obtained, the image and objectcan change places. When the object is a point of light, theposition of the image b (fig. 81) is called the conjugate focus ofthe object b ; if the candle were placed at b, then the image io6 Light would be at b. A good gas-flame…
Physics
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
