Ultraviolet radiation, a component of sunlight, is electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays. This type of radiation is categorized into UVA, UVB, and UVC bands. The intensity of these rays reaching the Earth’s surface varies daily and is influenced by factors such as time of day, season, geographic location, and cloud cover. For example, the levels are typically highest during midday hours and in tropical regions.
Understanding the daily intensity of this radiation is vital for public health. Excessive exposure can lead to sunburn, premature aging, and increased risk of skin cancer. Protective measures, such as sunscreen application and limiting time outdoors during peak hours, can mitigate these risks. Historically, awareness of the dangers associated with prolonged exposure has driven the development of sunscreens and public health campaigns aimed at promoting sun safety.
