American Board of Opticianry (ABO) Practice Test

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Which component of visible light has the shortest wavelength?

  1. Red

  2. Green

  3. Blue

  4. Violet

The correct answer is: Violet

Violet has the shortest wavelength out of all the colors in the visible light spectrum. Red, green, and blue have longer wavelengths and are considered to be less energy. The longer the wavelength, the less energy the light has. This means that violet has more energy than the other colors provided. So while red, green, and blue are incorrect because they have longer wavelengths, violet is the correct answer because it has the shortest wavelength and therefore the most energy.

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