How Does Formation of Shadows ( Umbra Prenumbra Antumbra ) Work?

Shadows are like when something blocks the light and makes a dark spot, just like when you put your hand between a lamp and the wall.

Imagine there’s a lamp shining bright, and you’re standing in front of it. Your body blocks some of that light, so behind you, on the wall, there’s a dark shape, that's your shadow. But what if there are two people standing between the lamp and the wall?

The person closer to the lamp blocks more light, creating a dark shadow, called the umbra. The other person, farther away, only blocks part of the light, so their shadow is lighter, that’s the penumbra.

Now imagine the lamp is really big, like the Sun, and you're standing between it and the Moon. Sometimes your body (or Earth) blocks all the sunlight from reaching the Moon, that makes a total eclipse, with a dark umbra on the Moon.

But if only part of the Sun is blocked, the Moon gets a partial shadow, called the penumbra, and we see a partial eclipse.

If you're standing even farther away, like in space, the light might not be completely blocked, just almost, making a lighter shadow called the antumbra, and that’s how we get a ring-shaped eclipse. Shadows are like when something blocks the light and makes a dark spot, just like when you put your hand between a lamp and the wall.

Imagine there’s a lamp shining bright, and you’re standing in front of it. Your body blocks some of that light, so behind you, on the wall, there’s a dark shape, that's your shadow. But what if there are two people standing between the lamp and the wall?

The person closer to the lamp blocks more light, creating a dark shadow, called the umbra. The other person, farther away, only blocks part of the light, so their shadow is lighter, that’s the penumbra.

Now imagine the lamp is really big, like the Sun, and you're standing between it and the Moon. Sometimes your body (or Earth) blocks all the sunlight from reaching the Moon, that makes a total eclipse, with a dark umbra on the Moon.

But if only part of the Sun is blocked, the Moon gets a partial shadow, called the penumbra, and we see a partial eclipse.

If you're standing even farther away, like in space, the light might not be completely blocked, just almost, making a lighter shadow called the antumbra, and that’s how we get a ring-shaped eclipse.