A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 595
y a clip or retort stand. Place horizontally a pinat some distance from the mirror, holding the pin also by a clip with the 570 LIGHT CHAP. point A of the pin near the axis of the mirror (Fig. 518). A real image ofA is produced at A, and may be seen by an eye placed to receive the raysafter they… … Fia. 518.—Focal length of concave mirror by method of parallax. eye up and down, A and B do not separate, and parallax is thus avoided.If they do separate it means that one is nearer the eye than the otherand there is then said to be parallax. Measure the distances of A and Bfrom the mirror and…
Physics
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