The debate on 5G has revived the controversy over electromagnetic waves, and their supposed dangers. But what are we talking about? Throw a pebble in the water, it twists around the point of fall; you created a wave. Take an electron, apply an energy to it; by vibrating it will deform its electric and magnetic fields. Congratulations, you have created an electromagnetic wave!
Do not boast too much: like any object whose temperature is above absolute zero, your body constantly produces it. Visible light is also an electromagnetic wave. In fact, the world is constantly bathed in a cloud of electromagnetic waves … Huge advantage of these waves: they propagate at the speed of light (300,000 km / s), can travel in a vacuum and cross all kinds of obstacles .
Their two important characteristics are their frequency (measured in Hertz, Hz) and their amplitude. Grab the end of a rope, then gesture upwards