The image displays two globe artichokes. The top one is exposed to regular daylight and the bottom one is illuminated by a 365 nm ultraviolet (UV-A) blacklight from Kroger supermarket.
Both artichokes appear identical when viewed under regular light conditions. They are green on their exterior, with some of the leaves appearing yellowish in color due to aging. The purple-colored part at the base of the stem and surrounding the white interior is the artichoke's heart.
However, upon exposure to UV-A light, the bottom artichoke exhibits a striking transformation. Its green exterior takes on a more vibrant appearance, while the purple-colored area around its heart becomes even deeper in color. The heart itself also shows increased brightness and vibrancy, now displaying shades of blue and white rather than just purple.
The image suggests that UV-A light can enhance the natural colors present in artichokes, although it does not provide information about whether this effect is solely due to UV-A light or if other factors are involved. – AI vision