Physicists have now seen waves “bounce” off a sudden change in time itself—a twist that flips their direction and shifts ...

When you shine a flashlight into a glass of water, the beam bends. That simple observation, familiar since ancient times, ...

Understanding what happens inside a material when it is hit by ultrashort light pulses is one of the great challenges of ...

In a groundbreaking discovery, physicists have observed light traveling in reverse, an event that significantly challenges ...

Physicists in the US claim to have created the first thin optical film with a refractive index close to that of air. The film consists of an array of obliquely-deposited nanorods, which can ...

A beam transformed: Optical transforms like tight focussing and total internal reflection, which gives rise to an evanescent field, can lead to out-of-plane polarization components and transverse spin ...

As showing how far under favourable conditions the reflection of light from a cloudy sky is visible, I may perhaps be allowed to mention that last night at nine o'clock the reflection of the London ...