PSI Barbering Practice Exam 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 580

Ultraviolet light is best known for its ability to produce what effect?

Heating

Acne reduction

Skin tanning

Ultraviolet (UV) light is best known for its ability to produce skin tanning. When skin is exposed to UV radiation, it triggers a response in melanocytes, the cells responsible for producing melanin, which is the pigment that gives skin its color. This process not only darkens the skin but also serves as a protective mechanism against further UV damage.

While aspects like heating may occur due to light exposure and certain wavelengths can influence skin conditions or hair growth, these effects are secondary compared to the direct and well-known impact of UV light on skin tanning. This tanning effect results from the skin's natural defense mechanism activating in response to UV light exposure, which is why this option stands out as the most recognized function of ultraviolet light in relation to skin.

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Hair growth

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