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Heat: Science Lesson: Activity 3 of 3



[+] Click to enlarge the image

Another way to classify EM energy is by the frequency of the waves. Frequency describes how often a wave peaks. Think of waves hitting the shore in different rhythms: some waves are long and slow, others are short and come one after the other.


Frequency is the reciprocal of wavelength, which means:

  • The longer the wavelength, the lower the frequency.
  • The shorter the wavelength, the higher the frequency.

Sort the waves by frequency, from lowest to highest. You can click on the EM spectrum to enlarge the image.

Radio wave
Visible light
Gamma ray
Question 2 of 3