What is the relationship between wavelength and laser penetration?

The correct answer highlights that longer wavelengths allow for greater penetration in laser treatments. This relationship is primarily due to the way different wavelengths interact with tissues. Longer wavelengths tend to penetrate more deeply into the skin because they are less absorbed by the superficial layers and more likely to pass through them.

In contrast, shorter wavelengths are typically absorbed more readily by the outer layers of the skin, thus limiting their penetration capability. For example, shorter wavelengths like those used for certain skin treatments may target specific chromophores, but they do not reach deeper tissues as effectively.

The concept of wavelength’s effect on penetration is a fundamental principle in laser therapy, influencing the choice of laser for specific treatments based on the depth of tissue needing intervention. As a result, understanding the implications of wavelength in terms of absorption and penetration is crucial for selecting the appropriate laser settings for various skin conditions and treatment goals.