Written Laser Hair Removal Practice Exam 2025 - Free Laser Hair Removal Practice Questions and Study Guide

Selective photothermolysis works by selecting a specific wavelength of light that is preferentially absorbed by the target tissue, such as the melanin in hair follicles during laser hair removal. This specific wavelength allows for precise targeting of the desired tissue without affecting surrounding structures. Therefore, option B is the correct answer because it accurately describes how selective photothermolysis works by choosing a specific wavelength for the target tissue.

In contrast:

- Option A is incorrect because using the highest energy level possible does not guarantee selective targeting of the specific tissue.

- Option C is incorrect because increasing the pulse duration does not necessarily ensure selective targeting of the desired tissue.

- Option D is incorrect because cooling the surrounding tissue is a method to protect it from potential damage during the treatment but does not directly relate to how selective photothermolysis works.