Rare fraction or the bendig of waves takes place when a light wave changes

The Cause of Refraction. We have learned that refraction occurs as lightpasses across the boundary between two media. ... The transmission of lightacross a boundary between two media is accompanied by a change in both the speed and wavelength of the wave.

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.