Pennsylvania Esthetician State Board Practice Exam

What type of rays are associated with a negatively charged electrode?

1. Red Rays

2. Violet Rays

3. Green Rays

4. Blue Rays

The correct answer is: Violet Rays

The association of negatively charged electrodes with violet rays is rooted in the concept of light and its interaction with electrical currents. In electrotherapy and modalities used in esthetics, violet rays are produced when an electrical current passes through a gas in a vacuum tube, typically at low pressure. The result is the emission of ultraviolet light, which corresponds to the violet end of the visible spectrum. In the context of esthetics, violet rays have specific therapeutic properties, such as promoting circulation and stimulating the skin. They are often used in treatments for conditions like acne or other skin ailments due to their antibacterial properties. Understanding the electromagnetic spectrum helps clarify why violet rays are linked with negative electrodes, as they generally operate at higher frequencies and energy levels compared to other colors. This unique interaction underlies their effectiveness in various beauty and skin improvement treatments.