Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 118
Critical Angle.—Figure 86 shows whattakes place when a rayof light passes from adense medium, such aswater, to a rare medium,such as air. A ray of light AO passesfrom the dense mediumand goes into the raremedium at 0. Accordingto the law of refraction,the ray is bent away fromthe perpendicular… … Figure 86. — Diagram ExplainingCritical Angle. 108 REFRACTION AND LENSES and will always be greater than its corresponding angle ofincidence. If the angle of incidence becomes large enough (i2), theangle of refraction (r2) becomes equal to 90°, and the re-fracted ray passes out along the surface of…
Physics
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