Researchers have bent one of the most basic rules of quantum mechanics, a counterintuitive branch of physics that deals with atomic-scale interactions. Its "complementarity" rule asserts that it is impossible to observe light behaving as both a wave and a particle, though it is strictly both.

Why is quantum physics counterintuitive?

Even more counterintuitive: two particles can become entangled, losing their individuality. ... Because both particles are described by a common state (the wavefunction), these correlations are stronger than what is possible in classical physics.

Can quantum mechanics be wrong?

Question 1: Are the equations of quantum mechanics wrong? The answer to this is a qualified, No. The equations of quantum mechanics work with extremely high accuracy to predict the results of experiments with atomic and subatomic particles.