What is refraction?

refraction
[ri5frAkFEn]
n.
折光, 折射

refraction
AHD:[r¹-fr²k“sh…n]
D.J.:[ri6fr#k.*n]
K.K.:[r!6fr#k.*n]
n.
The turning or bending of any wave, such as a light or sound wave, when it passes from one medium into another of different density.
折射 当光或声波等物质从一个媒体进入别一个密度不同的媒体中时产生的转向或折回
Astronomy
【天文学】
The apparent change in position of celestial objects caused by the bending of light rays entering Earth's atmosphere.
大气折射由于天体的光线进入地球大气层时发生折射而造成的其位置明显改变
Medicine
【医学】
The ability of the eye to bend light so that an image is focused on the retina.
眼睛的折射力眼睛折射光线的能量，从而使物体形象集中于视网膜上
Determination of the refractive characteristics of the eye.
屈光度测定对眼睛折射特性的测定

refrac“tional or refrac“tive adj.
refrac“tively adv
refrac“tiveness or re”fractiv“ity
AHD:[r¶”fr²k-t¹v“¹-t¶] n.