Of the following, which one would produce the softest light?

• A. a very overcast sky
• B. direct sun
• C. a small window
• D. a bare bulb

Answer: (A)

Soft light comes from a source that appears large relative to the subject and is often diffused, so shadows are gentle and transitions are gradual. An overcast sky acts as an enormous diffuser: clouds break up and spread sunlight, making the light come from a very large apparent size and from many angles. This diffusion reduces contrast and softens edges, producing the softest illumination.

Direct sun, by contrast, is a small, intense source that creates sharp, well-defined shadows and high contrast. A small window provides a lighter, still relatively small source, which can cast crisper shadows unless diffused, and a bare bulb behaves like a point source, often delivering harsh, directional light with hard shadows—especially if it’s close.