James Clark Maxwell was a physicist who lived in the last century, who was interested in how electricity and magnetism worked. One of his accomplishments was making the mathematical equations that describe how these two separate natural phenomena work together to make light and radio waves
The equations are:
- light is made of electric and magnetic fields that change very, very rapidly
- as the electric field in a light wave changes, it changes the magnetic field; as the magnetic field changes, it changes the electric field; both fields work together to make up the light wave
- if we know the electric and magnetic properties of space, we can calculate the speed of light
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