How Does a Shadow Form Exactly?

Shadows are like a game of hide-and-seek between light and objects. When an object blocks the path of light, it makes a shadow, kind of like when you stand in front of a flashlight and your whole body turns dark! The edge is clear because the light stops right at the edge of the object. It’s simple magic that happens every day.

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Examples

A tree casts a long shadow on the ground during the day because the sun is high up.
Your hand blocks all the light from your face when you hold it close to your eyes.
The moon makes a clear shadow on Earth when it’s directly between the sun and us.

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Categories: Physics · light,shadow formation,optics