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.
Omega (capital: Ï, lowercase: Ï; Greek ÏÎ¼Î­Î³Î±) is the 24th and last letter of the Greek alphabet. In the Greek numeric system, it has a value of 800. The word literally means great O (Å mega, mega meaning great), as opposed to omicron, which means little O (o mikron, micron meaning little).