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Related to refractiveness: refractoriness
refraction of light
i: angle of incidence
r: angle of refraction
1. The deflection of a wave, such as a light or sound wave, when it passes obliquely from one medium into another having a different index of refraction.
2. Astronomy The apparent change in position of a celestial object caused by the bending of light rays as they enter Earth's atmosphere.
a. The ability of the eye to bend light so that an image is focused on the retina.
b. Determination of this ability in an eye.
re·frac′tion·al, re·frac′tive adj.
re·frac′tive·ness, re′frac·tiv′i·ty (rē′frăk-tĭv′ĭ-tē) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.