A megahertz is one million (or 106) hertz.
See hertz, kilohertz (one thousand hertz), gigahertz[?] (109 hertz), terahertz[?] (1012 hertz), and petahertz[?] (1015 hertz).
... Contents Dennis Gabor Dennis Gabor (Gábor Dénes) (1900-1979) was a Hungarian physicist. He invented holography in 1947, for which he ...