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.
3. pikey. Originally a harmless slang name for a gypsy and/or traveller, being derived from the word 'turnpike.'. Now generally regarded as a term of abuse that encompasses any persons perceived as common, tasteless, flashy, in-bred, thieving and a whole host of other sins, the primary term is till applied to gypsies.he Pikey: NOT A CHAV/TOWNIE-A totally different type of cretin. A pikey is someone of dubious origin who would like to be known as a traditional happy-go-lucky romany type, but in reality is an illiterate thieving bastard who would stoop to previously unheard of depths in an attempt to 'earn' money.