Peck, William G. (William Guy), 1820-1892 · New York, Chicago, A. S. Barnes & company · leaf 90
m-mer the rays of the sun are, on an average, more uearly perpendicularto the horizon, and consequently more efficient in their heating effect,than they are during the autumn and winter. For reasons analogous to those set forth above, the hottest part ofthe day should be some time after noon and… … Fig. 34. Diagram il-lustrating: refraction. common surface of the two media, and this change of direc-tion or bending is called refraction. In Fig. 34, AB represents the surface that separates the two mediaP and Q ; CD is the path of a ray in the medium P, and DE is itspath in the medium Q, FG…
Astronomy
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