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dropping a pebble in a pond, except light waves are extremely small.) The wavelengths of light are not colors, but produce the sensation of color. Light is a form of energy. All wavelengths of light are part of the electromagnetic energy spectrum. The spectrum is a continuous sequence of energy waves that vary in length from short to long. Visible lightùthe wavelengths our

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eyes can detectùis a small portion of the entire spectrum. At one end of the visible spectrum are the short wavelengths of light we perceive as blue. At the other end of the visible spectrum are the longer wavelengths of light

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Visible light is a very small portion of the  electromagnetic energy spectrum. The spectrum is a continuous sequence of energy waves that vary in length with the shorter wavelengths at one end and longer wavelengths at the other.