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.
DIY Garage Designer is a professional-class web application thatâs easy to use. 1  Web-based garage building design application. 2  Click & drag method of drawing designs. 3  Multiple construction methods & building preferences. 4  Multi-view, with realistic shading and 3D rotation. 5  Detailed printouts for building permits.