What's the Point of a Shadow?

Imagine you're playing with a flashlight and your hand. When you put your hand between the light and the wall, a shadow appears, it's like your hand is saying, 'I'm here!' Shadows help us see where things are, even when they’re not completely visible. It’s like having invisible friends that show you what's going on.

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Examples

  1. Your hand makes a shadow on the wall when you turn off the lights.
  2. A tree casts a shadow on the ground during the day.
  3. You see your pet’s shadow when they walk across the floor.

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Categories: Physics · light· optics· shadow· geometry · Text is available under the Creative Commons Attribution-ShareAlike License.