Written Laser Hair Removal Practice Exam

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Ace your laser hair removal certification with our comprehensive practice exam. Featuring multiple-choice questions, detailed explanations, and hints, get the preparation you need to ensure success.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which color has the longest wavelength in visible light?

Blue
Green
Yellow
Red

The correct answer is: Red

Red has the longest wavelength in visible light among the options provided. In the visible light spectrum, red light has the longest wavelength and the lowest frequency, while blue light has the shortest wavelength and the highest frequency. Wavelength and frequency are inversely related - as the wavelength increases, the frequency decreases. Therefore, red light with its longer wavelength is the correct answer in this case.