Focus on these two facts: an oscillating electric field generates an oscillating magnetic field; an oscillating magnetic field generates an oscillating electric field. Those two points are key to understanding electromagnetic waves. read more
Electromagnetic waves. Electromagnetic radiation, is a form of energy emitted by moving charged particles. As it travels through space it behaves like a wave, and has an oscillating electric field component and an oscillating magnetic field. read more
Electromagnetic waves are generated by moving electrons. An electron generates an electric field which we can visualize as lines radiating from the electron Figure 10a. If the electron moves, say it vibrates back and forth, then this motion will be transferred to the field lines and they will become wavy Figure 10b. read more
Electromagnetic waves are created within the electromagnetic field due to quantum oscillation,if you go to Maxwell eight equations you will find this field is clearly related to charge density,where charge is the source of the EMF.These electromagnetic waves like light has different wave lengths so it has different frequency because f=c/l,where c is light speed,it is constant and l is the wave length,which is the distance between the neighboring two crests or troughs. read more
Best Answer: An electromagnetic wave exists when the changing magnetic field causes a changing electric field, which then causes another changing magnetic field, and so on forever. Unlike a STATIC field, a wave cannot exist unless it is moving. read more
Fundamentally, electromagnetic radiation is generated by accelerating charges. Any acceleration will do it really, so as long as you can manipulate the velocity of a charge, you're in business. But of course, you're not going to get radiation that is of much use in terms of transmitting information. read more