How Does Quantum Tunneling Work?

Imagine you are throwing a ball at a wall. Usually, if you do not throw it hard enough, the ball bounces back. But in the tiny world of atoms, particles can sometimes teleport straight through walls like ghosts! This happens because they act like both solid balls and wavy ripples in water.

When we look at a particle closely, it does not have one exact spot. It is spread out a little bit, like a blurry cloud. If this cloud touches the other side of a wall, there is a small chance the particle can just appear on the other side without breaking through.

You might wonder if this happens in real life. Yes! The sun shines because atoms tunnel together to create energy. Also, your phone uses flash memory that relies on electrons tunneling through thin layers of metal oxide to store your photos and apps. Without quantum tunneling, our world would look very different!