Light Science and Magic 4/e

Notice that the strength of the field moves from zero to its maximum-positive strengths and then back to zero; it then repeats the pattern in the negative direction. This is why the field around a beam of light does not attract metal like an iron magnet does. The field around a photon of light is positive half of the time and negative the rest of t

Because photography is the manipulation of light, the chapter defines lighting as the relationship between the light, the subject, and the viewer.

we are primarily concerned with the brightness, color, and contrast of the light.

Absorption

and subject and the choice of lens

results and sometimes

Photographic lighting is more than just light. Lighting is a relationship between the light, the subject, and the viewer. If we want to say any more about lighting, we must talk about the subject.

will increase contrast in a dark subject, whereas decreasing exposure may increase contrast in a light gray scene.

Transmission