What Makes a Shadow Last Longer Than Light?

Shadows are like little friends that don’t want to leave. When light moves away, they take time to fade because the objects around them keep blocking it for a while. It’s like when you hide behind a big tree, even after the sun goes down, your shadow still lingers.

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Examples

A tall tree casts a long shadow that stretches across the yard even after the sun has set.
Your shadow on the floor lingers for seconds after you turn off the lamp in your room.
The back of a couch blocks light, and its shadow takes time to fade once the lights are turned off.

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Categories: Physics · optics,light,shadows