The wave-particle duality is one of those essential pillars. Physics courses devote weeks to just introducing it – but there are still important aspects that can be covered in a short article.

Light is everywhere,it illuminates our world, enables vision, and travels across galaxies. But what is light, really? Is it a wave or a particle? The answer is both,and neither, depending on how ...

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.

The wave-particle duality is one of those essential pillars. Physics courses devote weeks to just introducing it – but there are still important aspects that can be covered in a short article.

Wave-particle duality is a cornerstone of quantum mechanics, which is our modern theory of how subatomic particles behave.

But until we figure out a way to test quantum gravity using gravitational waves, we won't know whether the "particle" part of wave-particle duality holds for gravitons.

Is there some way to tell, fundamentally, what the nature of a quanta is, and whether it’s wave-like or particle-like at its core? That’s what Sandra Marin wants to know, asking: ...

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.