PSI Barbering Practice Exam

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What device delivers a focused beam of light to layers of skin without affecting surrounding tissues?

Laser
LED light
Infrared light
Blue light

The correct answer is: Laser

A laser is designed to deliver a concentrated beam of light that targets specific layers of skin. The unique properties of lasers allow them to penetrate the skin to precise depths, making them highly effective for various dermatological procedures, such as hair removal, tattoo removal, and skin resurfacing, without damaging surrounding tissues. This focused nature of laser light is what differentiates it from other types of light therapy. LED light, while useful in various skin treatments, does not have the same level of precision in targeting specific skin layers as lasers do. Infrared light is primarily used for heating modalities and is not as precise when it comes to delivering focused treatment to skin layers. Blue light is effective for certain skin conditions, particularly acne, but it also lacks the capability to penetrate as deeply or as specifically as a laser. Thus, the focused quality and precision make lasers the preferred choice for targeted skin treatments.