16 julio 2015
A method for designing materials capable of slowing the propagation of light over a broad range of wavelengths has been developed. The speed of light in a vacuum is always constant — a fundamental concept made famous by Albert Einstein. But light propagates more slowly when it enters a different medium, such as glass. The degree to which the speed is reduced is given by a material’s dielectric constant — a higher dielectric constant indicates slower propagation. Rather than rely on a limited source of natural substances, scientists have started to design optical materials with a broader range of beneficial properties including ‘slow’ light.img src=»http://feeds.feedburner.com/~r/sciencedaily/~4/WdOhtPmaqOQ» height=»1″ width=»1″ alt=»»/
http://feeds.sciencedaily.com/~r/sciencedaily/~3/WdOhtPmaqOQ/150716161118.htm
