someone told me that glass stops uv rays. if true, does that mean u can't get burned if you sit behind a pane of glass, regardless of the sunlight intensity?

 

yeah, as far as i know you can't get a tan or anything. however, you can burn things with a magnifying glass if you focus the light, you can get one of those types of burns. just not a sunburn as in overtanning.

 

http://amos.indiana.edu/library/scripts/sunburn.html

 

uv can't pass through glass. i learned that from my physics teacher

 

From the DOE's Argonne National Laboratory:
http://www.newton.dep.anl.gov/askasc.../chem00539.htm

 

educational thread

 

UV certainly can pass through ordinary, non-treated glass. It will block a considerable amount of UVB (which causes sunburns), but not all. I guarantee if you sit in a car for days on end, like on a coast to coast road trip, one arm will come out more tan than the other. Glass will not block UVA rays, which won't give you a sunburn, but they will give you cancer!