What Is the Difference Between Visible Light and X-Rays?

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According to NASA, visible light waves are the only electromagnetic waves that are seen with the naked eye. Visible light waves are known as the colors of the rainbow, and each color has a different wavelength. According to Georgia State University, visible light wavelengths are between 750 to 400 nanometers. X-rays are invisible and have much shorter wavelengths and a higher frequency than visible light.