Are Electromagnetic Waves and Light a Family?

The earliest human understanding of electromagnetic waves was in the field of optics. Many famous physicists in history have explored the nature of light, among them the great scientist Newton. In 1666, the British physicist Newton made a very famous experiment. He placed a prism under the sunlight and turned the prism to make the light shine on a plane. The resulting plane shows seven color bands of red, orange, yellow, green, blue, indigo, and violet. In response to this phenomenon, Newton boldly speculated that sunlight is a mixture of seven colors of light. When they pass through a prism, they have different deflection angles due to different refractive indices, thus showing seven different colors. This is the first time in human history that there is a direct understanding of the "family" of visible light. However, limited by the technology at the time, people did not study light and electromagnetic waves together.

After Hertz confirmed the existence of electromagnetic waves in 1888, more and more scientists began to pay attention to electromagnetic waves. Through more in-depth research and exploration, it was not only proved that light is an electromagnetic wave, but also more forms of electromagnetic waves were discovered. The essence is exactly the same, but the wavelength and frequency are very different.

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