Slice of prickly pear (fruit of Opuntia) when exposed to ...

The image presents two photographs of a prickly pear fruit slice, showcasing its appearance under regular daylight and when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a supermarket.

**Regular Daylight Photograph:**

* The top photograph features a greenish-yellow slice of prickly pear with numerous brown spots.
* These dark spots are likely the seeds or glochids within the fruit.

**Ultraviolet (UV-A) Blacklight Photograph:**

* The bottom photograph reveals the same slice under UV-A light, highlighting the presence of blue fluorescence around the seeds or glochids.
* This fluorescence suggests that these areas may contain compounds that react with ultraviolet radiation, emitting a blue glow in response.

**Key Observations and Implications:**

* The photographs demonstrate the varying appearance of the prickly pear fruit when exposed to different light sources.
* The UV-A blacklight reveals additional details about the fruit's internal structure and composition, potentially aiding in understanding its nutritional or medicinal properties. – AI vision