Section of star fruit (Carambola) when exposed to regular ...

The image presents a striking comparison of the appearance of star fruit under regular daylight and when exposed to ultraviolet (UV-A) light. The top section displays a slice of star fruit illuminated by natural daylight, while the bottom section shows the same slice under UV-A blacklight from a supermarket.

**Top Section: Daylight Illumination**

* **Color**: The star fruit appears yellowish in color.
* **Texture**: The surface is smooth with no visible blemishes or imperfections.
* **Shape**: The shape of the fruit is characteristic, featuring five pointed ends that resemble a star when viewed from above.

**Bottom Section: UV-A Blacklight Illumination**

* **Color Change**: Under UV-A light, the star fruit exhibits a dramatic color change, turning bright blue. This phenomenon is known as fluorescence.
* **Glowing Spots**: The surface of the fruit displays several glowing spots where the skin has been damaged or bruised. These areas appear white or pale yellow due to the presence of fluorescent compounds in the fruit's cells.
* **Shape and Texture**: The shape of the fruit remains unchanged, but the texture appears slightly rougher than under daylight illumination.

**Conclusion**

The image effectively demonstrates the ability of UV-A light to reveal hidden details on the surface of star fruit. This non-destructive method can be useful for assessing the quality and freshness of fruits without causing damage. – AI vision