Why does the frequency of a wave increases the wavelength decreases

Because their product (frequency times wavelength) is always
the SAME number ... wave speed. 

So if one of them changes, the other one has to change, by the
same factor but in the opposite direction, in order for the product
to stay constant.

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.

The duration of a photographic flash is related to an rc time constantly