In Search of the Multiverse

According to the Copenhagen Interpretation, it is meaningless to ask what atoms, electrons and other quantum entities are doing when we are not looking at them. And we can never be certain what the precise outcome of a quantum experiment will be. All we can do is calculate the probability that a particular experiment will come up with a particular result. This is exactly like the way that if you roll a pair of true dice there will be a certain probability of getting a score of 12, another probability of getting a total of 5, and so on.

Even though we cannot understand what is going on in the quantum world, the equations of quantum mechanics make it possible to describe what is going on, with great precision. By knowing, for example, the circumstances in which electrons seem to move like waves and the circumstances in which they seem to behave like particles, we can design computer chips. It may be crazy, but it works.