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.
Dermatology with 630+ answers. Sunburn is caused by ultraviolet (UV) radiation damage to your skin. Too much UV damages your skin cellâs DNA, and your immune system responds by killing off the bad cells. Because UV radiation doesnât penetrate (unlike X-rays for example), it damages only the surface layer of your skin.