electromagnetic radiation – Energy travels throughout the universe at the speed of light. It does so in the form of electromagnetic radiation. What that radiation is called depends on its wavelength, or color.
electromagnetic field – a field which exerts a force on particles that possess the property of electric charge, and is in turn affected by the presence and motion of those particles.
Electromagnetism – the physics of the electromagnetic field.
A changing magnetic field produces an electric field (this is the phenomenon of electromagnetic induction, the basis of operation for electrical generators, induction motors, and transformers). Similarly, a changing electric field generates a magnetic field. Because of this interdependence of the electric and magnetic fields, it makes sense to consider them as a single coherent entity—the electromagnetic field.
The magnetic field is produced by the motion of electric charges, i.e. electric current. The magnetic field causes the magnetic force associated with magnets.
Electromagnetism – Televisions, computers, smartphones, microwave ovens, and even the light bulb are made possible by control of electromagnetism.
That’s engineering
- phenomenon – an observable fact or event; an outward sign of working of a law of nature
- electric charge – a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction.
- electromagnetic spectrum – The total range of wavelengths of electromagnetic radiation. Visible light is a small part of the electromagnetic spectrum. It also includes x-rays and ultra violet rays (high frequency) and infra-red and radio waves (low frequency).
Engineering ideas
- electron, charge, spectrum, wavelength, radiation, frequency
Learn more…
- Introduction to Electromagnetism – online course
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