How Does a Shadow Form on the Ground?

Shadows are like the opposite of light. When a light, such as the sun, shines on something, like you or a tree, it blocks some of that light from reaching the ground. The shadow is where that blocked light goes missing. If the light is high up and straight above, the shadow is short. But when the light is low, like in the morning or evening, the shadow stretches out far.

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Examples

  1. A tall tree casts a long shadow during sunrise.
  2. Your friend's shadow stretches across the sidewalk at sunset.
  3. The dog’s shadow becomes tiny when it stands under a bright light.

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Categories: Physics · light· shadow· optics· geometry