The relative strength index (RSI) is a technical indicator used in the analysis of financial markets.
light from the sun that has a fairly short wavelength and causes skin to go brown and look older. UVB is an abbreviation for 'ultraviolet B-rays'.
The sunlight that reaches us is made up of two types of harmful rays: long wave ultraviolet A (UVA) and short wave ultraviolet B (UVB). UVA rays penetrate deep into the dermis, the skin's thickest layer.
