Wright, Mark R., 1854- · London : Longmans · leaf 124
and look through it ata lighted candle (fig. 96); the candle seems raised ; the ray (/« isrefracted a.s eh and h k, the eye sees the image of the candle at /. The angle d 0 / is called the angle of deviation \ b a c\s, therefracting angle, and A the refracting edge of the prism. Make a small hole… … The spot of light is Fig. 96. on a screen. Behinxi the hole place a prism with the refractingedge horizontal! and parallel to the screen,moved to b, and by join-ing these two positionswith the hole, the angleof deviation is practi-cally found. Remove the objec-tives and condensersfrom the lantern,…
Physics
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