1 Secondary emission: An electron, atom or molecule colliding with the surface of the cathode with enough energy can knock electrons out of the surface. 2  Photoelectric emission: Electrons can also be emitted from the electrodes of certain metals when light of frequency greater than the threshold frequency falls on it.
Best Answer: Do it yourself, often referred to by the acronym DIY, is a term used by various communities that focus on people (called do-it-yourselfers or DIYers) creating or repairing things for themselves without the aid of on-duty, work-stationed paid professionals.
What does &quot;tacky&quot; mean? What does it mean to be a tacky person? My mom calls me tacky and I have no idea what that means. Please help, thanks! 1. not tasteful or fashionable; dowdy. 2. shabby in appearance; shoddy: a tacky, jerry-built housing development. 3. crass; cheaply vulgar; tasteless; crude. 4. gaudy; flashy; showy.