What Is a Shadow Made Of?

A shadow is like a dark copy of something you see in the light.

Imagine you're playing with a toy in a sunny room. When you put your hand between the toy and the wall, a shadow appears on the wall, it looks just like your hand, but it's dark. That’s because light can’t go through your hand, so it gets blocked, and that makes the shadow.

What Makes a Shadow Appear

Think of light as little helpers running from a light source, like the sun or a lamp. These helpers run straight to where they’re going. If something is in their way, like your hand, the helpers can’t get through, so that spot becomes dark. That's how a shadow is made!

Why Shadows Change Shape

If you move your hand closer or farther from the wall, the shadow gets bigger or smaller. It’s like when you hold up a big cup and then a small one, they cast different-sized shadows on the table.

So, a shadow isn’t magic, it's just light being blocked by something in its path!

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Examples

  1. A child sees a shadow on the ground when their feet block the sunlight.
  2. A tree casts a long shadow during sunset.
  3. You can make a shadow with your hand and a lamp.

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Categories: Physics · light· shadow· optics