Final answer:
A violet color on the Woods Lamp indicates that the material being observed absorbs yellow-green light, leading to a red-violet color appearance.
Step-by-step explanation:
A violet color on the Woods Lamp typically indicates that the material being observed absorbs yellow-green light, resulting in a color that appears red-violet. This is an example of color absorption where different materials can absorb light at various wavelengths, thereby affecting the color that they appear under a Wood's Lamp. In a clinical setting or dermatology, a Wood's Lamp emitting UV light can help diagnose conditions by illuminating fluorescence in the skin related to fungal or bacterial infections, changes in pigmentation, and more, but in this context, it's likely referring to the color absorption properties of a material.