Details of a slice of prickly pear (cactus fruit) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a supermarket. College Station, Texas, September 3, 2024

The image features two side-by-side photographs of a slice of prickly pear fruit, showcasing its appearance under different lighting conditions.

**Image Details**

* The top photograph displays the fruit under regular daylight, revealing a yellowish-green color with brown spots and an uneven texture.
* In contrast, the bottom photograph shows the same fruit illuminated by a 365 nm ultraviolet (UV-A) blacklight from a supermarket, which causes it to glow bright blue-purple.

**Lighting Conditions**

* The use of UV light highlights the presence of fluorescent compounds in the fruit's skin and flesh, resulting in a vibrant color that is not visible under normal lighting conditions.
* This phenomenon is likely due to the fruit's natural pigments, such as betalains or carotenoids, which are sensitive to ultraviolet radiation.

**Overall Appearance**

* The images demonstrate how different lighting conditions can affect our perception of an object's appearance and reveal hidden details that might not be apparent under normal circumstances.
* The use of UV light in the second photograph provides a unique perspective on the prickly pear fruit, highlighting its complex chemical composition and the diversity of its natural pigments. – AI vision

Detalles de una rebanada de piña de maguey (fruta de cactus) cuando se expone a la luz diurna normal y cuando se ilumina con una luz negra ultravioleta (UV-A) de 365 nm de un supermercado. College Station, Texas, septiembre 3, 2024. La imagen presenta dos fotografías lado a lado de una rebanada de fruta de maguey, mostrando su apariencia en diferentes condiciones de iluminación. **Detalles de la Imagen** *La fotografía superior muestra la fruta bajo luz diurna normal, revelando un color verde amarillento con manchas marrones y una textura desigual. *En contraste, la fotografía inferior muestra la misma fruta iluminada por una luz negra ultravioleta (UV-A) de 365 nm de un supermercado, que hace que destaque un color azul púrpura brillante. **Condiciones de Iluminación** *El uso de luz ultravioleta resalta la presencia de compuestos fluorescentes en el exterior e interior de la fruta, lo que resulta en un vibrante color que no es visible bajo condiciones normales de iluminación. *Es probable que este fenómeno se deba a pigmentos naturales de la fruta como betal. – Spanish translation