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Bible Dictionaries
Refraction

Webster's Dictionary

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(1):

(n.) The act of refracting, or the state of being refracted.

(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.

(3):

(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.

(4):

(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.

Bibliography Information
Webster, Noah. Entry for 'Refraction'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​r/refraction.html. 1828.
 
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