Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 108
M Figure 71. — Showing Reflec-tion of a Ray of Light. IMAGE IX A PLANE MIRROR 97 … Figure 72. — A Pencil of Rays. The object is ab; MM, the An image is the space occupied rays. A small bunch of rays is called a pencil of rays, and this is what we have to consider instead of single rays. A person gets a pencil of rays, or many pencils of rays, in his eye, instead of just single…
Physics
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