use the text to compare and contrast uvb rays and uva rays.\ntwo kinds of radiation make up the light from…

use the text to compare and contrast uvb rays and uva rays.\ntwo kinds of radiation make up the light from the sun that penetrates the atmosphere and reaches earth: long - wave ultraviolet a (uva) and short - wave ultraviolet b (uvb). though uvb rays tend to damage the skins outer layers, causing redness and sunburn, uva rays penetrate the skins thickest layer, known as the dermis. it was once thought that only uvb rays were cause for concern. over the years, however, scientists have learned more about how uva rays damage skin cells in the basal layer, where a majority of skin cancers form. now we know that uva rays pose dangers similar to those from uvb rays in terms of skin cancer development. in addition, both types of rays contribute to the premature aging of skin.\n| |uvb rays|uva rays|\n|--|--|--|\n|penetrate the atmosphere| | |\n|penetrate the dermis| | |\n|play a role in skin cancers| | |\n|play a role in skin aging| | |

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