PhysicsDoughnut-shaped laser used to create an optical fibre out of air Shooting a brief but powerful laser beam shaped like a doughnut through the air created a light pulse that acts like an optical fibre, carrying data 45 metres ¿ìè¶ÌÊÓÆµ
PhysicsPhysicists should take time to ponder the strangest ideas There are other ways to explain wave-particle duality than Albert Einstein's, but we don't teach them. Excluding the conceptual challenges of quantum mechanics from the classroom limits our students, says Chanda Prescod-WeinsteinComment