In fact it can even be in infinitely many places at the same time, exactly as a wave. Hence the notion of wave-particle duality, which is fundamental to all quantum systems.

Wave-particle duality inevitably leads to the Heisenberg Uncertainty Principle. All periodic processes can be analyzed using the Fourier transform. The Fourier transform decomposes a function of ...

Does light behave more like a particle, or like a wave? Today we know the surprising answer. Here's why it took so long to get there.

In the traditional formulation of quantum mechanics, when a particle is measured -- meaning it is found to be in one particular location -- the wave function is said to collapse.

Like all other subatomic particles, photons exhibit wave-particle duality, meaning that sometimes they behave as tiny particles and sometimes they act as waves.

Scientists have long known that light can behave as both a particle and a wave—Einstein first predicted it in 1909. But no experiment has been able to show light in both states simultaneously.

The wave function is a mathematical description of the external attributes of a particle: its position, momentum, and rotational characteristics.

The double-slit experiment was designed to investigate whether light is a wave or a particle. It is one of the most famous and weirdest experiments in physics.

The classic quantum mechanics problem is a particle in a 1-D box. Here is a numerical solution to that problem.