Why do people say light, radio, microwave, Infrared and gamma waves so on are electromagnetic waves?
What are electromagnetic waves? And why is light or radio so on electromagnetic? Why do light waves or radio waves have no mass and cannot be measured?
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An electromagnetic wave is, to be *super* reductive, energy. If you imagine a field of static electromagnetism to be like a pond, an electromagnetic wave travels along this field in the same way a wave would travel across the water of a pond.
These waves are usually caused by something, like the movement of matter, creating an imbalance that causes a ripple, like throwing a stone in a pond.
We classify these waves by their oscillating frequency. At the low end it’s radio waves, at the high end it’s gamma waves. Visible light sits somewhere in the middle.
Energy isn’t matter, so you can’t weigh it. You can measure how hot something is by temperature, but the weighing scale doesn’t tell you how hot it is.
But you CAN measure the amplitude of an electromagnetic wave, the wave length, the frequency and the intensity.
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