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electromagnetic wave

electromagnetic wave

4 4.2
A wave of energy made of changing electric and magnetic fields that travels at the speed of light
  • noun
  • /ˌɛlɛktroʊmægˈnɛtɪk weɪv/
  • Specialized
translation icon : onda electromagnética
  • Most radio emission is unpolarized; the electromagnetic waves arrive without their electric and magnetic components having any preferred direction.
  • propagation of electromagnetic waves

You wouldn't say electromagnetic waves vibrate, you'd say they oscillate.

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Examples

  • Electromagnetic waves, such as radio waves and microwaves, play a crucial role in modern communication systems.

  • The main resources available for astronomical study are electromagnetic waves, such as radio, visible light, and X-rays, radiated by celestial bodies.

    Academic text (2000)
  • So that is actually what we call electromagnetic wave and radiation.

  • No electromagnetic waves can go in or out of this stage.

  • New measurements of electromagnetic waves could indicate they were on the right track.

    Blog text (2)
  • I use electromagnetic waves to stimulate their olfactory nerve center.

  • Electromagnetic waves of radio frequency can make molecules vibrate and heat up, like microwaves heat food.

    Academic text (2003)
  • As a result, a neutron star emits narrow and intense beams of electromagnetic waves from its north and south magnetic poles.

    Academic text (2001)
  • Electromagnetic waves detect and quantify damaged sections of pipe, making it possible to avoid ruptures and unnecessary repairs.

    Academic text (2002)
  • In 1887, Hertz, at the University of Bonn, produced electric spark discharges and demonstrated the propagation of electromagnetic waves through space.

    Academic text (1995)

Synonyms

electromagnetic radiation
vselectromagnetic wave
  • Specialized
7 4.2

Waves of energy like radio, visible light, and X-rays that move through space

is the same waves defined by oscillating electric and magnetic fields moving at light speed

How High Frequency

gamma ray
  • Specialized
21 4.2
X-ray
  • Specialized
99 3.2
ultraviolet
  • Specialized
24 5.8
electromagnetic wave
  • Specialized
4 4.2
visible light
  • Specialized
10 3.4
infrared
  • Specialized
5 4.8
radio wave
  • Specialized
19 3.2

Surface Forms

Morphology

electromagnetic + wave

The phrase is fully compositional: 'electromagnetic' specifies the type of 'wave' (one involving electric and magnetic phenomena), so a learner who knows both constituents can infer it denotes a wave of electromagnetic activity. This is a regular English compounding pattern common in scientific vocabulary and has clear cross-linguistic parallels, making it immediately understandable to a B1 learner who knows the parts.

Etymology

Electromagnetic wave gives a simple picture: two invisible forces, electric and magnetic, change and push each other so a wave moves through empty space. So the name electromagnetic wave means 'a wave of energy made of electric and magnetic parts that travels at the speed of light'.