In this hypothetical scenario, a cat is placed inside a sealed box along with a radioactive atom, a Geiger counter, a vial of poison, and a hammer. The Geiger counter is connected to the vial of poison and the hammer. If the Geiger counter detects the decay of the radioactive atom, it triggers the hammer to break the vial of poison, causing the cat's death.
Now, according to quantum mechanics, before we open the box and observe the system, the cat and the radioactive atom exist in a superposition of states, meaning the cat is both alive and dead simultaneously. It's crucial to understand that this is not a real-life situation; it is a thought experiment to explore the implications of quantum theory.
However, once an observer opens the box to look inside, the act of observation collapses the superposition, and the cat is found to be either alive or dead, with no in-between state. This observation seemingly contradicts our classical understanding of reality, where an object is either in one state or another, not both.
Schrödinger's cat highlights the peculiarities of quantum mechanics and raises questions about the nature of reality, measurement, and the role of the observer in quantum systems. It has become a symbol of the bizarre and often puzzling behavior of particles at the quantum level and continues to be a subject of philosophical and scientific debates.