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 Phi Beta Sorority, Inc. was founded on the ideals of scholarship, sisterly love, community service and finer womanhood. With these ideals under our wings, Zeta has set a tradition of firsts. Zeta Phi Beta Sorority, Inc. was the first Greek letter organization to charter a chapter in Africa, form auxiliary groups, and establish a national headquarters.