Black hole light echoes are an extreme form of gravitational lensing. To measure the masses and spins of black holes, ...

Snell’s Law explains light refraction at material boundaries, a principle crucial to fiber optics, lens design, and advanced ...

Much of modern life depends on the coding of information into means of delivering it. A common method is to encode data in laser light and send it through optic cables. The increasing demand for more ...

Why is the expansion of our universe accelerating? Twenty-five years after its discovery, this phenomenon remains one of the greatest scientific mysteries. Solving it involves testing the fundamental ...

Future VR headsets could use a new type of lens inspired by holographic devices. The bilayer bifocal lens relies on external ...