UV rays are a form of electromagnetic radiation that comes from the sun and can have harmful effects on the skin and eyes.

In the case of red wine, UV rays can be beneficial as they help the phenolic compounds present in the grape skins to convert into tannins, which gives the wine its characteristic color and flavor.

However, excessive exposure to UV rays can cause degradation of these compounds and affect the quality of the wine.

Therefore, it is important to control the exposure of grapes to sunlight to ensure the quality of red wine.

* This text has been generated automatically