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.
While these rays share the attributes listed below, they are most noticeable in far infrared waves. : Infrared rays radiate or spread from a localized source. Unlike visible light, infrared rays can deeply penetrate skin and the underlying tissues up to 1.5 to 2.8 inches (approx. 3.75 - 7 cm).