Critical angle
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| File:Wiktionary-logo-en-v2.svg | Look up critical angle in Wiktionary, the free dictionary. |
Critical angle may refer to:
- Critical angle (optics), the angle of incidence above which total internal reflection occurs
- Critical angle of attack, in aerodynamics; the angle of attack which produces the maximum lift coefficient
- Critical angle of repose, in engineering; the steepest angle of descent of a slope when the material is on the verge of sliding
