Colorado Esthetician Written Practice Exam

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What type of light cannot be perceived with the naked eye?

Visible Light

Visible light includes wavelengths that can be seen by the human eye, ranging from about 400 to 700 nanometers. However, in this context, the correct answer refers to a category of light that is not visible to the naked eye.

Invisible light, such as ultraviolet (UV) light or infrared light, falls outside this visible spectrum. Unlike visible light, which can be perceived directly, these forms of light cannot be seen without special equipment. Therefore, the type of light that cannot be perceived with the naked eye includes wavelengths beyond the visible range, which would not be classified under visible light.

Understanding light types in esthetics is crucial, especially when discussing the effects of different wavelengths on skin treatments and conditions. Familiarity with these concepts can guide practitioners in selecting appropriate tools and techniques in their practice.

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Indirect Light

Direct Light

Reflective Light

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