Sumpweed (Iva annua) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from Lick Creek ParkLick Creek: Background Notes. College Station, Texas

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College Station, Texas, September 11 - XX, 2024

Album 3618: College Station, Texas, September 11 - XX, 2024

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The image presents a comparative view of Sumpweed (Iva annua), showcasing its appearance under regular daylight and when illuminated by a 365 nm ultraviolet (UV-A) blacklight.

**Image Composition**

* The left side of the image features a photograph of Sumpweed in natural light.
   + The plant's green coloration is evident, with thin stems and leaves that appear similar to those of other plants.
   + The background is dark, which helps to highlight the plant's details.
* On the right side of the image, the same plant is illuminated by a 365 nm UV-A blacklight from Lick Creek Park. College Station, Texas, September 11, 2024.

**Key Features**

* Under UV-A light:
   + The plant's leaves and stems exhibit a purple hue.
   + This phenomenon is known as fluorescence, where certain materials absorb energy from the UV light and emit it back at longer wavelengths.
   + The intensity of the purple coloration varies across different parts of the plant.

**Conclusion**

The image effectively demonstrates how Sumpweed exhibits fluorescence under UV-A light, highlighting its unique characteristics. – AI vision

🇪🇸 Descripción en español / Spanish Description

El musgo de agua (Iva annua) cuando se expone a la luz diurna habitual y también cuando se ilumina con una luz negra de longitud de onda ultravioleta (UV-A) de 365 nm desde el parque Lick Creek. College Station, Texas, septiembre 11, 2024. La imagen presenta una vista comparativa del musgo de agua (Iva annua), mostrando su apariencia bajo luz diurna habitual y cuando se ilumina con una luz negra ultravioleta (UV-A) de 365 nm. **Composición de la imagen** * El lado izquierdo de la imagen presenta una fotografía del musgo de agua en luz natural. + La coloración verde de la planta es evidente, con tallos y hojas finos que parecen similares a los de otras plantas. + El fondo es oscuro, lo que ayuda a resaltar los detalles de la planta. * En el lado derecho de la imagen, la misma planta está iluminada con una luz negra UV-A de 365 nm desde el parque Lick Creek. College Station, Texas, septiembre 11, 2024. **Características principales** * Bajo luz UV-A: + Las hojas y tallos de la planta presentan un tinte morado. + Este fenómeno se conoce como fluorescencia, donde ciertos materiales absorben energía de la luz UV y la emiten nuevamente en longitudes de onda más largas. + La intensidad del color morado varía en diferentes partes de la planta. **Conclusión** La imagen demuestra efectivamente cómo el musgo de agua exhibe fluorescencia bajo luz UV-A, resaltando sus características únicas. – Spanish translation

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