refraction
/rɪˈfrækʃən/noun
mass noun
1- Physics the fact or phenomenon of light, radio waves, etc., being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density【物理】折射。
1.1
- change in direction of propagation of any wave as a result of its travelling at different speeds at different points along the wave front（波的）折射。
1.2
- measurement of the focusing characteristics of an eye or eyes（眼睛的）屈光度测定, 验光。
词源
mid 17th cent.: from late Latin refractio（n-）, from refringere 'break up' （see REFRACT）.