Ultraviolet index. The ultraviolet index or UV Index is an international standard measurement of the strength of sunburn-producing ultraviolet (UV) radiation at a particular place and time. The scale was developed by Canadian scientists in 1992, then adopted and standardized by the UN's World Health Organization and World Meteorological Organization in 1994.
one-quarter-one of four equal parts; a quarter of a pound. fourth part, one-fourth, quarter, quartern, twenty-five percent, fourth. common fraction, simple fraction-the quotient of two integers.
To find one quarter (1/4) of a number all you need to do is divide your number by 4. However, a quicker way to find one quarter is to half your number and then half if again. Method 1: Divide by 4. Method 2: Half the number and half again. Letâs take a look at some examples. I shall use both methods.