A number of factors can lead companies to close stores. One is mergers and acquisitions activity. As organizations join forces under a single umbrella, locations that once competed for sales can become redundant, leading to store closings.
There are 3 types of ultraviolet (UV) rays: 1  Ultraviolet A rays (UVA) make up most of the sun's natural light. They can penetrate deep into the skin, causing wrinkles and premature aging of the skin.  Ultraviolet B rays (UVB) are the main cause of sunburn. They are nearly 1,000 times stronger than UVA rays.
Like sunlight on water, UV, visible and IR radiation can be partially reflected from the outer surface of the skin and eyes, and as it penetrates the tissue it can be scattered in various directions (including backwards) from microscopic particles and structures such as fibers (e.g., present in the dermis of the skin).