Definitions of refraction
n. - The act of refracting, or the state of being refracted. 2
n. - The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a different density from that through which it has previously moved. 2
n. - The change in the direction of a ray of light, and, consequently, in the apparent position of a heavenly body from which it emanates, arising from its passage through the earth's atmosphere; -- hence distinguished as atmospheric refraction, or astronomical refraction. 2
n. - The correction which is to be deducted from the apparent altitude of a heavenly body on account of atmospheric refraction, in order to obtain the true altitude. 2
The word "refraction" uses 10 letters: A C E F I N O R R T.
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