Why do shadows stretch and shrink based on the light?

Shadows change size because of how light moves and where it hits things.

Imagine you're playing with a flashlight and your favorite toy. When you shine the light straight on the toy, its shadow is small, like when you sit right in front of the TV. But if you tilt the flashlight so it's slanted, the shadow grows bigger, like when you lean back on the couch and your shadow stretches across the floor.

Light acts like a painter, drawing shadows on whatever surface is nearby. When the light is close and straight, it paints a small shadow. When the light moves far away or angles in, it paints a longer shadow, just like how your shadow grows bigger when the sun is low in the sky at sunset.

Think of it like this: if you're holding a toy and shining a flashlight on it from across the room, the shadow has more space to spread out. But if the light is right next to the toy, the shadow doesn’t have far to go, so it stays small.

So shadows stretch and shrink because light moves, just like how your shadow changes when you move around!