Observer (quantum physics)

Okay kiddo, imagine you are watching a really cool game of hide and seek with your friends. When you peek through the bushes to see where your friend is hiding, you become the "observer" because you are watching what is happening.

In quantum physics, an observer is someone or something (like a machine) that can measure or record information about microscopic particles, like electrons. When we observe these particles, we can see them acting like both a wave and a particle at the same time (which is weird, I know).

Before we observe the particle, it can exist in many different possible locations at the same time. But when we observe it, we force it to make a choice and "collapse" into one location. It's kind of like watching your friend come out of hiding because you've caught them, and they can't be in multiple places at once anymore.

So basically, an observer plays an important role in quantum physics because they can cause things to "collapse" into one location or state, which helps us understand how these tiny particles behave.