0.11 A note about diagrams by Benjamin Crowell, Light and Matter  licensed under the Creative Commons Attribution-ShareAlike license.

0.11 A note about diagrams

A quick note about diagrams. Often when you solve a problem, the best way to get started and organize your thoughts is by drawing a diagram. For an artist, it's desirable to be able to draw a recognizable, realistic, perspective picture of a tomato, like the one at the top of figure h. But in science and engineering, we usually don't draw solid figures in perspective, because that would make it difficult to label distances and angles. Usually we want views or cross-sections that project the object into its planes of symmetry, as in the line drawings in the figure.

0.11 A note about diagrams by Benjamin Crowell, Light and Matter  licensed under the Creative Commons Attribution-ShareAlike license.