Putting the brakes on light (In the laboratory physicist Lene Vestergaard Hau, the speed at which light travels can be slowed down to 38 miles per hour)
Jp. Wiley, Putting the brakes on light (In the laboratory physicist Lene Vestergaard Hau, the speed at which light travels can be slowed down to 38 miles per hour), SMITHSONIAN, 30(3), 1999, pp. 26