Which configuration yields a sharper shadow due to the source being relatively smaller?

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Multiple Choice

Which configuration yields a sharper shadow due to the source being relatively smaller?

Explanation:
A shadow’s edge sharpness comes from how large the light source appears from the surface. A small light source emits rays from a limited area, so the boundary between lit and shadowed regions is precise, producing a crisp shadow. A large or diffuse source sends light from many angles, creating more penumbra and a softer, blurrier edge. So, to achieve a sharper shadow, use the configuration with the smaller source (a spot beam) rather than a flood beam. The idea is that smaller sources yield crisper edges, while larger sources soften them.

A shadow’s edge sharpness comes from how large the light source appears from the surface. A small light source emits rays from a limited area, so the boundary between lit and shadowed regions is precise, producing a crisp shadow. A large or diffuse source sends light from many angles, creating more penumbra and a softer, blurrier edge. So, to achieve a sharper shadow, use the configuration with the smaller source (a spot beam) rather than a flood beam. The idea is that smaller sources yield crisper edges, while larger sources soften them.

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