Question

Electromagnetic waves are produced when _____.

a) an electric charge vibrates or accelerates

b) there is exertion of magnetic forces on charged particles

c) there is alignment of an electric field and a magnetic field

d) a magnetic change occurs in a medium

Answer 1

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. These waves oscillate perpendicularly to and in phase with one another.

Answer 2

i think they want you to say a)

Answer 3

The right answer is option ( a )

Answer 4

when a charged particle is accelerated , radiations are emitted which are called electromagnetic waves

Answer 5

a) an electric charge vibrates or accelerates

very good example of this is the BREMSSTRAHLUNG background radiation produced in an X ray machine along with the characteristic spikes, characteristic of the material of the target which the rapidly DECELERATING electrons hitting the target emit. When a charge particle OSCILLATES it's acceleration is related to it's position in the oscillation cycle, and so changes, and so the oscillating charge emits radiation (There's a LOT more to it than that, inevitably.)