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 is a Greek letter social fraternity. ZBT was founded on December 29, 1898. After being founded as the world's first Jewish Zionist Fraternity, in 1954 Zeta Beta Tau became nonsectarian and opened their doors to non-Jewish members, changing their membership policy to include All Men of Good Character. ZBT values the diversity of its brothers.