Scientists drag light by 5 degrees by slowing to the speed of sound,
Issued: Sun, 15 Jan 2012 13:02:00 GMT
"By slowing a beam of light down to the speed of sound, UK researchers have dragged photons by an unprecedented 5°, proving a longstanding theory of physics and opening up potential applications in quantum data storage.
The speed of light is constant in a vacuum, such as space, where it travels at 671 million miles per hour.
When it travels through different substances, such as water or solids, its speed is reduced, with different wavelengths (colours) travelling at different speeds."