Physics » Electromagnetic Waves » Production of Electromagnetic Waves

Summarizing Production of Electromagnetic Waves

Production of Electromagnetic Waves Summary

  • Electromagnetic waves are created by oscillating charges (which radiate whenever accelerated) and have the same frequency as the oscillation.
  • Since the electric and magnetic fields in most electromagnetic waves are perpendicular to the direction in which the wave moves, it is ordinarily a transverse wave.
  • The strengths of the electric and magnetic parts of the wave are related by

    \(\cfrac{E}{B}=\text{c},\)

    which implies that the magnetic field \(B\) is very weak relative to the electric field \(E\).

Glossary

electric field

a vector quantity (E); the lines of electric force per unit charge, moving radially outward from a positive charge and in toward a negative charge

electric field strength

the magnitude of the electric field, denoted E-field

magnetic field

a vector quantity (B); can be used to determine the magnetic force on a moving charged particle

magnetic field strength

the magnitude of the magnetic field, denoted B-field

transverse wave

a wave, such as an electromagnetic wave, which oscillates perpendicular to the axis along the line of travel

standing wave

a wave that oscillates in place, with nodes where no motion happens

wavelength

the distance from one peak to the next in a wave

amplitude

the height, or magnitude, of an electromagnetic wave

frequency

the number of complete wave cycles (up-down-up) passing a given point within one second (cycles/second)

resonant

a system that displays enhanced oscillation when subjected to a periodic disturbance of the same frequency as its natural frequency

oscillate

to fluctuate back and forth in a steady beat


Continue With the Mobile App | Available on Google Play

[Attributions and Licenses]


This is a lesson from the tutorial, Electromagnetic Waves and you are encouraged to log in or register, so that you can track your progress.

Log In

Share Thoughts