Waves close wavesVibrations that transfer energy from place to place without the transference of matter. - including sound and light - can be reflected at the boundary between two different materials.

Researchers demonstrate a new technique for suppressing back reflections of light, leading to better signal quality for sensing and information technology. Researchers demonstrate a new technique for ...

This week's selection of images again shows how strongly photography works with light and atmosphere. Fog, twilight, and night create reduced spaces in which shapes, lines, and contrasts are ...