Today we learned about waves. Waves are all around us, in the ocean, in the football stadium, any sound and light. A wave is a disturbance or oscillation in space and time. Think of it as a wiggle in time and space. There are several properties to a wave, such as frequency. Frequency is the number of cycles that pass in one second. Cycles are measured by wavelength which is between two consecutive identical points of a wave (crest to crest, trough to trough, etc.) We use controlled frequencies to create different waves and make radio possible. Each radio station is represented by a number because that is the frequency of that radio wave. For example 93.9 has 93.9 waves pass in one second. This is frequency 93.9Hz or Hertz, the unit for frequency.
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