Light in a spin
Johannesburg, South Africa (SPX) Apr 17, 2015 - Light must travel in a straight line and at a constant speed, or so the laws of nature suggest. Now, researchers at the University of the Witwatersrand in Johannesburg have demonstrated that laser light traveling along a helical path through space, can accelerate and decelerate as it spins into the distance. This is the first time that angular acceleration has been observed with light, and ... more
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