Slice of a section of a tangerine from Kroger supermarket when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight. College Station, Texas

🎞️ #3609-14

The image presents two photographs of a tangerine slice, one taken under regular daylight and the other illuminated by a 365 nm ultraviolet (UV-A) blacklight.

* **Daylight Photograph**
* The top photograph shows the tangerine slice in natural light.
* It appears to be a typical orange color with visible texture on its surface.
* The background is dark, which helps to highlight the vibrant colors of the fruit.
* **UV-A Blacklight Photograph**
* In contrast, the bottom photograph was taken using a 365 nm UV-A blacklight.
* This technique causes certain substances to fluoresce or glow under ultraviolet illumination.
* The tangerine slice emits a bright blue-green light across its surface, indicating the presence of fluorescent compounds such as flavonoids.
* The background remains dark, allowing the glowing effect to be more visible.

In summary, the image effectively demonstrates how the use of UV-A blacklight can reveal hidden details about the composition and properties of various objects. By comparing these two photographs, we can observe the difference in appearance when viewed under normal lighting versus under ultraviolet illumination. – AI vision

🇪🇸 Descripción en español / Spanish Description

Un pedazo de una sección de una tangerina del supermercado Kroger cuando está expuesto a la luz diurna regular y cuando se ilumina con una luz negra ultravioleta (UV-A) de 365 nm. College Station, Texas, 27 de agosto de 2024. La imagen presenta dos fotografías de un trozo de tangerina, una tomada bajo la luz diurna normal y la otra iluminada con una luz negra ultravioleta (UV-A) de 365 nm.
* **Fotografía a la luz diurna** *
La fotografía superior muestra el trozo de tangerina en luz natural. Parece ser de un color naranja típico con textura visible en su superficie. El fondo es oscuro, lo que ayuda a resaltar los vibrantes colores del fruto.
* **Fotografía bajo iluminación UV-A** *
En contraste, la fotografía inferior se tomó usando una luz negra ultravioleta de 365 nm. Esta técnica hace que ciertas sustancias fluoresezcan o brille con iluminación ultravioleta. El trozo de tangerina emite un brillo azul verdoso a lo largo de su superficie, indicando la presencia de compuestos fluorescentes como los flavonoides.
El fondo permanece oscuro, lo que permite que el efecto brillante sea más visible. En resumen, la imagen demuestra eficazmente cómo el uso de luz negra ultravioleta puede revelar detalles ocultos sobre la composición y propiedades de diversos objetos. Comparando estas dos fotografías podemos observar la diferencia en apariencia cuando se ven bajo iluminación normal frente a la iluminación ultravioleta. – Spanish translation

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