What is the Bremsstrahlung or dipole radiation mechanism involved in the emission of radiation by the rotating or moving charge? 
A rotating charge such as the electron classically orbiting around the nucleus, will constantly lose energy in
  form of electromagnetic radiation.   

I asked my teacher about how this radiation is created from the charge. My teacher said that energy is usually lost by the mechanisms such as Bremsstranhlung, Dipole radiation, etc. But, I don't have these mechanisms in my text book and I need to know how these mechanisms are carried out, so that I would understand the concepts better. So, I thought Physics Stack Exchange will help me. 
 A: Bremsstrahlung Radiation
Dipole Radiation
Accelerated charges radiate. This is the golden rule. 
The physical causes of electro-magnetic radiation are called legion for they are many. However, the mathematical mechanism is fairly straight-forward conceptually (while being a real bear in the details). Here's the basic idea: by solving Maxwell's Equations one acquires a wave equation for the electric and magnetic fields. These equations tell us that changes in these fields propagate away from their source at a speed $c$ (the speed of light). However, these waves carry energy with them, and by conservation of energy, the emitting sources must lose energy.
A: Bremsstrahlung is a German fancy name for a type of Electromagnetic wave (an X-Ray to be specific). According to classical electromagnetism, whenever a charged particle accelerates an electromagnetic wave is produced. The source of bremsstrahlung (or "braking radiation") is the negative acceleration of an electron in a Coolidge tube (Google it for the details of the experiment). Inside a Coolidge tube, collisions between electrons and metal nuclei cause rapidly moving electrons to decelerate rather quickly, thus producing a continuous spectrum in the X-Ray region. 
A: Brehmstrahlung is actually whenever a very fast electron enters a "medium" where the "local speed of light" e.g. a block of glass where c=0.7 is less than the speed of the electron. It's not that different from the sonic boom when a jet plane travels faster than the local speed of sound.
