Lene Hau. Lene Vestergaard Hau (born November 13, 1959 in Vejle, Denmark) is a Danish physicist. In 1999, she led a Harvard University team who, by use of a Bose-Einstein condensate, succeeded in slowing a beam of light to about 17 metres per second, and, in 2001, was able to stop a beam completely.
Zeta is the sixth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 7. It was derived from the Phoenician letter zayin. Letters that arose from zeta include the Roman Z and Cyrillic Ð.
Zeta Beta Tau. Zeta Beta Tau (Î¶Î²Ï) is a Greek letter social fraternity. ZBT was founded on December 29, 1898, as the first Jewish Zionist Fraternity. Due to policy changes, Zeta Beta Tau has moved away from its exclusively Jewish membership and Zionist mission of its founding.