By the interactions of Electric and Magnetic fields perpendicular to it.
An EM is produced by the vibration of an electrically charged particle
By the interactions of Electric and Magnetic fields perpendicular to it.
electromagnetic wave is not a sound wave
em wave is generated by photons which emitter the energy in the form of light
No. Sound is a mechanical wave, not an EM wave.
radio wave
A moving charge (such as an electrical current) generates a magnetic field at right angles, true, but this field is stable and unchanging. An EM wave is only produced by a changing movement, for example an AC current. The condition would be that the field will change (and produce a wave) only if the current changes.
EM waves stand for Electromagnetic waves.
all of the em spectrum is measured i waves
They're the same. EM stands for electromagnetic.
visible light
No, it's not. EM wave is a single unit, and it cannot exist without ether of components (electric, magnetic).