The refraction or 'bending' of beams of light through water, glass lenses or prisms is a side-effect of the retardation of light through these transparent media.
(The refraction or 'bending' of beams of light through water; is; a side-effect of the retardation of light through these transparent media)
The refraction or 'bending' of beams of light through water
is
a side-effect of the retardation of light through these transparent media