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 was founded on the campus of Howard University on January 16, 1920. The Sorority's international programs such as Z-HOPE (Zetas Helping Other People Excel) through Mind, Body and Spirit serve to empower people from all walks of life.As the sorority moves toward its centennial, it retains its original zest for excellence.