. How electromagnetic waves are produced
- Electromagnetic waves (EMW) are produced by accelerated charge particles.
- Charge particles which experience change in velocity are responsible for electromagnetic waves. Stationary charge particles only produce electric fields and charge moving with uniform velocity produces only magnetic fields.
- An accelerated charge particle (example charge doing oscillation) will produce a time varying electric field E, which produces a time varying magnetic field B and vice-versa.
- These time varying electric and magnetic fields are perpendicular to each other and are self-sustaining, which results in production of electromagnetic waves.
- The direction of propagation of electromagnetic wave is perpendicular to both electric and magnetic field and hence is also known as transverse wave.
- Examples of electromagnetic waves are light, microwaves, radio waves, ultraviolet rays, X-rays, gamma-rays etc.
Electromagnetic waves are produced by accelerated charge particles. Light is an example of electromagnetic wave.