Fig. 116. image of AZB2 formed by the lens 3. It is this real imagewhich is viewed by the eyepiece. #1O2. The Camera Lucida. This instrument shewnin section in fig. 117 consists of a four-sided prism, ABCD, of … glass. The angle at A is a right angle and when in use thesides AB, AD are generally horizontal and vertical respectively, 101-103] AIDS TO VISION. 167 the angles at B and D are 67° 30, so that the angle at C is 135°.When in use a ray from an object PQ at some little distance,travelling…
Heat · Light
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
