If at a particular instant and at a certain point in space the electric field is in the +x-direction and has a magnitude of 4.50 v/m , what is the magnitude of the magnetic field of the wave at this same point in space and instant in time?

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.

Idont understand the question