oys illustrating the phenomena of applies; that is, that the angle of incidence and the light, the simplest is the water bulb magnifier. The concave mirror is arranged so that the prolonga- It consists of a small hollow sphere of. glass’ filled tion of its axis will bisect the angle formed by lines… … A little experiment will determine thecorrect position nary prism may be made for the mirror. When the proper adjustment is reached, CONCAVE CYLINDRICAL MIRROR, CAUSTICS. to exhibit several Fraun- a wonderfully real image of the bouquet appears in hofer’s lines by arranging the reflected raysdo not…
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