Answer:

the throwing back by a body or surface of light, heat, or sound without absorbing it.

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.

When light encounters transparent materials, almost all of it passes directly through them. Glass, for example, is transparent to all visible light.

Translucent objects allow some light to travel through them.

In optics, the refractive index of a material is a dimensionless number that describes how fast light travels through the material.

As light passes through a prism, it is bent, or refracted, by the angles and plane faces of the prism and each wavelength of light is refracted by a slightly different amount. ... As a result, all of the colors in the white light of the sun separate into the individual bands of color characteristic of a rainbow.