Oregon Esthetician State Board

What are the three types of electromagnetic energy?

1. Visible light, X-rays, and microwaves

2. Visible light, sound waves, and UV rays

3. Visible light, invisible infrared light, and invisible ultraviolet radiation

4. Ultrasound, visible light, and laser

The correct answer is: Visible light, invisible infrared light, and invisible ultraviolet radiation

The correct choice encompasses the three primary categories of electromagnetic energy as it relates to the visible spectrum and other forms of radiation that are important in esthetics. Visible light is the portion of the electromagnetic spectrum that is perceivable by the human eye, facilitating visual experiences and is utilized in various esthetic treatments. Invisible infrared light encompasses wavelengths that are just beyond the visible spectrum and are significant for their ability to produce heat, which can be beneficial in various skin therapies. Invisible ultraviolet radiation includes wavelengths shorter than visible light and have important applications in skin treatments, as they can impact the skin's pigmentation and are also used in specific therapeutic modalities. Together, these types highlight the relevance of electromagnetic energy in the context of esthetics, emphasizing the importance of each form in skin treatment applications. The other options include elements that either do not fall strictly within the realm of electromagnetic energy (like sound waves) or mix categories that don’t fully represent the overarching classification of electromagnetic energy. Understanding the categories allows estheticians to leverage these energies in their practices effectively.