Written Laser Hair Removal Practice Exam 2025 – All-in-One Guide to Master Your Certification!

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Which UV rays are considered the dominant tanning rays?

UVB rays

UVA rays

UVA rays are considered the dominant tanning rays because they are longer in wavelength, able to penetrate deeper into the skin, and cause the skin's pigment cells to produce more melanin, resulting in a tan appearance. UVB rays, on the other hand, are shorter in wavelength and cause sunburns rather than tanning. UVC rays are mostly absorbed by the Earth's ozone layer and do not reach the Earth's surface. Infrared rays do not have any tanning properties and instead provide heat. Therefore, UVA rays are considered the dominant tanning rays compared to the other options given.

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UVC rays

Infrared rays

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