Written Laser Hair Removal Practice Exam

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Prepare for the Written Laser Hair Removal Exam. Study with flashcards and multiple-choice questions, each question includes hints and explanations. Get ready to succeed on your exam!

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Which color has the longest wavelength in visible light?

  1. Blue

  2. Green

  3. Yellow

  4. 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.

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