Scientists have long known that the speed of light can be slowed slightly as it travels through materials such as water or glass. However, it has generally been thought impossible for particles of light, known as photons, to be slowed as they travel through free space, unimpeded by interactions with any materials. But now in new research, scientists have managed to slow photons in free space for the first time - suggesting the speed of light is even more complex than we imagined. University of Glasgow scientists found a way to slow the speed of light In an experiment one photon was beaten in a race by another They did this by passing a photon through a 'mask' This slowed its speed - like how the speed of light is slower in water But when it emerged from the 'mask' it still travelled at this slower speed The scientists say it indicates light is even more complex than we thought
Very informative. It would help to be able to do things like this as it can lead to something greater.
