Homogeneity and heterogeneity
Concept of uniformity or non-uniformity in an object's composition or attributes / From Wikipedia, the free encyclopedia
For other uses, see Homogeneity (disambiguation) and Heterogeneity (disambiguation).
Homogeneity and heterogeneity are concepts relating to the uniformity of a substance, process or image. A homogeneous feature is uniform in composition or character (i.e. color, shape, size, weight, height, distribution, texture, language, income, disease, temperature, radioactivity, architectural design, etc.); one that is heterogeneous is distinctly nonuniform in at least one of these qualities.[1][2]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/4/47/Homog%C3%A8ne_h%C3%A9t%C3%A9rog%C3%A8ne.png/220px-Homog%C3%A8ne_h%C3%A9t%C3%A9rog%C3%A8ne.png)
only 'b' is homogeneous