What is the main hazard associated with ultraviolet radiant energy?

Ultraviolet (UV) radiant energy is known to pose significant risks to human health, particularly in the form of severe burns and vision problems. The two primary types of health hazards associated with UV radiation are skin damage and eye damage. When skin is exposed to excessive UV light, it can lead to sunburn, which is a form of radiation burn. Over time, this exposure can also increase the risk of developing skin cancer.

In terms of vision, UV radiation can cause eye problems, such as photokeratitis, which is akin to sunburn of the eye, and may also contribute to cataract development, leading to impaired vision. This understanding of the dangers associated with UV radiation highlights the importance of protective measures, such as sunscreen, protective clothing, and eyewear, especially when outdoors.

In contrast, the other options do not accurately reflect the hazards posed by UV radiation. The notion that UV light is visible and benign misrepresents the nature of UV radiation, as it is indeed invisible to the human eye and not innocuous. Additionally, the claim that UV radiation has no impact on human health is inaccurate, as there are well-documented effects of exposure. Finally, the suggestion that UV radiation is primarily thermal in nature overlooks its classification as