(~s, ~ing, ~ed)
When a ray of light or a sound wave ~s or is ~ed, the path it follows bends at a particular point, for example when it enters water or glass.
As we age the lenses of the eyes thicken, and thus ~ light differently.
...surfaces that cause the light to reflect and ~.
VERB: V n, V
~ion
...the ~ion of the light on the dancing waves.
N-UNCOUNT