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.
A theta is the latin word for a specific symbol used in mathematical equations. The theta means the angle. You use the theta symbol to say angle. The symbol is useful when y â¦ ou don't know the degree of the angle is. * * * * * Theta is not Latin nor is it a word.It is a letter of the Greek alphabet.It is used to stand for an unknown angle in the same way that the Roman letters x or y are used in algebra.n trigonometry, theta is a symbol commonly used to represent an unknown angle in the same way you might use x to label an unknown side or an unknown number in general. Theta â¦ looks like this: Î¸. 2 people found this useful.