For example, in the fraction 3/4, the numerator, 3, tells us that the fraction represents 3 equal parts, and the denominator, 4, tells us that 4 parts make up a whole. The picture to the right illustrates 3 4 {\displaystyle {\tfrac {3}{4}}} or Â¾ of a cake.
The Causes of Sunburn Blisters. Sunburn blisters are a result of overexposure to the UVA and UVB rays in the sun. â¢ UVA. These harmful rays penetrate deep into the bottom skin layers and damage the production of new skin cells. High doses of UVA rays will cause sunburn blisters.
UVB as well as UVA rays may cause damage to skin. UV rays may bounce off water, sand, snow, and other surfaces causing sunburn. Persons with certain pigment disorders (albinism, lupus, porphyrias, vitiligo, and xeroderma pigmentosum) and individuals with fair skin are at most risk of sunburn.