What does the UV Index indicate?

The UV Index is a valuable measure that indicates the strength of ultraviolet (UV) radiation from the sun at a specific time and location. It provides a clear indication of the potential risk of harm from unprotected sun exposure, which is especially important for those looking to tan.

Understanding the UV Index helps individuals gauge how intense the sun's rays are, allowing them to make informed decisions about sun protection, including the application of sunscreen or the use of protective clothing. By being aware of the UV Index, people can better manage their time in the sun and minimize risks like sunburn or long-term skin damage.

The remaining choices do not accurately describe the purpose of the UV Index. For example, while knowing the best time to tan can be relevant, the UV Index itself does not address timing but rather the intensity of UV exposure. Consequently, the concept of skin types or the duration of safe tanning sessions also falls outside the scope of what the UV Index measures.