# Wave function

Schrödinger developed what is known as Schrödinger equation. This equation states that **there is a wave associated with any particle (like the electron), and it is called the wavefunction and it is spread out to fill the whole universe**.

What does all of that mean in plain English?

It means:

There is a fortune teller lady called *Schrödinger equation* who can predict and describe precisely and deterministically the quantum state of the particle.

So actually collapse of **the wave function is equivalent to saying that we can know where things are, only when we are actually looking at them. Blink and they are gone!**

Lady *Schrödinger equation* tells us too that **particles are like shy people. Their behavior depends on whether or not we are looking at them.**