Wavelengths are measured in which unit?

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Study for the 40Hr Laser Hair Removal Apprentice Test. Learn with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Wavelengths are measured in which unit?

Explanation:
Wavelength is the distance between successive peaks of a light wave, and in optics it’s described using very small units. Nanometers are the standard unit because they match the scale of visible and near-infrared light used in cosmetic lasers. Visible wavelengths range roughly from 380 to 750 nanometers, and common hair-removal lasers operate around 755, 810, or 1064 nanometers—all within that unit. Centimeters and meters are far too large to describe a light wave, since wavelengths are billions of times shorter than those units. An Angstrom is 0.1 nanometer, so it can describe wavelengths too, but nanometers are the conventional choice in modern optics and laser specifications.

Wavelength is the distance between successive peaks of a light wave, and in optics it’s described using very small units. Nanometers are the standard unit because they match the scale of visible and near-infrared light used in cosmetic lasers. Visible wavelengths range roughly from 380 to 750 nanometers, and common hair-removal lasers operate around 755, 810, or 1064 nanometers—all within that unit. Centimeters and meters are far too large to describe a light wave, since wavelengths are billions of times shorter than those units. An Angstrom is 0.1 nanometer, so it can describe wavelengths too, but nanometers are the conventional choice in modern optics and laser specifications.

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