Which time of day is UV radiation exposure typically highest?

UV radiation exposure is typically highest at noon. This phenomenon occurs due to the position of the sun in the sky, which is generally at its highest point during this time. When the sun is directly overhead, its rays travel through less atmosphere, resulting in a more direct and intense exposure to ultraviolet rays. During this period, UV radiation can peak, leading to increased risk of skin damage and other UV-related health issues.

In contrast, morning and evening times see the sun at a lower angle in the sky, which means that UV rays must pass through more atmosphere. This increased distance through the atmosphere scatters and absorbs more UV radiation, reducing the intensity of exposure. Nighttime, of course, has no sunlight, and therefore, there is no UV radiation exposure at all. Understanding these dynamics is crucial for effective sun safety practices and public health awareness.