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A How are electromagnetic waves produced? What is the source of energy carried by a prrgy carried by a propagating electromagneticWvesidentify the electromagnetic radiations undera.) In remote switches of household electronic devicesb.) as diagnostic tool in medicine.

Answer»

The creation of all electromagnetic waves begins with a charged particle. This charged particle creates an electric field (which can exert aforce on other nearby charged particles). When it accelerates as part of an oscillatory motion, the charged particle creates ripples, or oscillations, in its electric field, and also produces a magnetic field.

Once in motion, the electric and magnetic fields created by a charged particle are self-perpetuating—time-dependent changes in one field (electric or magnetic) produce the other. This means that an electric field that oscillates as a function of time will produce a magnetic field, and a magnetic field that changes as a function of time will produce an electric field. Both electric and magnetic fields in an electromagnetic wave will fluctuate in time, one causing the other to change.All the above sources of electromagnetic waves use the simple principle of moving charge



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