Day of invisibility cloak nears

Day of invisibility cloak nears | Homeland Security News Wire
In physics, the Doppler Effect describes the change in frequency of light or sound waves whenever there is a relative movement between an observer and a wave's source; thus, when an object and an observer move closer together, light frequency increases from red wavelengths to blue ones; when they move further apart, light frequency decreases from blue to red; researchers have for the first time ever demonstrated a reversal of the optical Doppler Effect -- a promising sign for the future development of science fiction-inspired technology such as invisibility cloaks; this technology, which has already been demonstrated on a micro-scale by U.S. researchers, may be closer to becoming a reality than most people think

Researchers from Swinburne University and the University of Shanghai for Science and Technology have for the first time ever demonstrated a reversal of the optical Doppler Effect — an advance that could one day lead to the development of invisibility cloak technology.