Critical angle can 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
Famous quotes containing the words critical and/or angle:
“His misfortune was that he loved youth—he was weak to it, it kindled him. If there was one eager eye, one doubting, critical mind, one lively curiosity in a whole lecture-room full of commonplace boys and girls, he was its servant. That ardour could command him. It hadn’t worn out with years, this responsiveness, any more than the magnetic currents wear out; it had nothing to do with Time.”
—Willa Cather (1873–1947)
“It is a mistake, to think the same thing affects both sight and touch. If the same angle or square, which is the object of touch, be also the object of vision, what should hinder the blind man, at first sight, from knowing it?”
—George Berkeley (1685–1753)