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A. The sun produces invisible rays called ultraviolet-A (UVA) or ultraviolet-B (UVB) that can damage the skin. Too much sun can cause sunburn, skin texture changes, and skin cancers. Rashes also can be attributed to sunlight. Even on cloudy days, UV radiation reaches the earth and can cause skin damage.
Ultraviolet (UV) radiation is the part of sunlight which causes sunburn, skin damage and skin cancer. Ultraviolet radiation can be broken down into three bands: UVA, UVB, and UVC. The amount of UV rays reaching the Earthâs surface varies throughout the day. The danger period is between 10am and 3pm. These are the hours when skin damage occurs the fastest. On a cloud-free day, we can feel maximum ultraviolet rays. However, ultraviolet levels are not related to the air temperature. There can be high levels of ultraviolet rays on cool days and UV rays still reach the Earthâs surface when there is cloud cover.