Though still only in the prototype stage, this flat lens could one day be used on space telescopes, and perhaps even on ...

Scientists have demonstrated how to manipulate light by using time-varying media in the form of specialized nanomaterials.

When a wave or light ray moves from one medium to another its speed changes. The direction of the ray may also change. This property of waves is called refraction and commonly occurs with light rays.

This film demonstrates the measurement of the speed of light in both air and water using experimental setups. The first ...

A unique feature has just occurred a couple of days before the spring equinox. We have the details on the extra daylight ...

Light is refracted when it enters a material like water or glass. Depending on the density of the material, light will reduce in speed as it travels through, causing it to change direction.