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The electromagnetic spectrum

The main types of electromagnetic radiation

X-rays, visible light and radio waves are all types of electromagnetic radiation.

The main types of electromagnetic radiation

frequencytype of electromagnetic radiationwavelength
highestgamma radiationshortest
visible light
lowestradio waveslongest

All types of electromagnetic radiation:

  • are transverse waves
  • travel at the same speed in a vacuum - empty space.

The speed of electromagnetic radiation in a vacuum is 299,792,458 m/s. This is approximately three hundred million metres per second - nearly nine hundred thousand times faster than sound, which is why you see a flash of lightning before you hear the thunder.

Back to The electromagnetic spectrum index

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