A shadow is an area where light is blocked by an object.
When light travels in a straight line and meets something opaque—like a person, a tree, or a building—the object prevents light from reaching the surface behind it. The result is a darker shape that mirrors the outline of the object. That dark shape is the shadow.
In simple terms
- Light source → shines
- Object → blocks the light
- Surface behind → receives less or no light➡️ A shadow appears
More than just physics
Beyond science, shadows carry deeper meaning:
- In photography, shadows add depth, contrast, mood, and mystery. They help shape forms and guide the viewer’s eye.
- In art, shadows can suggest time, direction, and emotion.
- In reflection and metaphor, a shadow often represents what is hidden, unseen, or overlooked—things that exist, but are not immediately visible.
A quiet reminder
A shadow only exists because light exists.
Without light, there would be no shadow at all.
That is why shadows are not merely darkness—they are proof of light, presence, and form.

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