What Makes a Shadow ‘Sharp’ or ‘Fuzzy’?

Imagine you're holding a toy dinosaur under a lamp. If the lamp is close, your shadow looks sharp and clear, like it's standing right there on the floor. But if the lamp is far away, your shadow might look blurry or even stretched out, like it’s melting into the floor. That happens because of how light travels from the source to the object and then to where you see the shadow.