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Re: tanning beds



On Wed, 17 Nov 1999, fred brace wrote:

We were discussing the fact that uv waves are absorbed by glass and that
you can't get a sunburn through glass. A number of people mentioned tanning
beds. What is the type of glass used there that lets uv waves pass through.
If you have a vis/UV spectrophotometer handy or can get to one, place a
small testtube filled with water in the cell holder and measure the
absorption spectrum. Many common glasses transmit significantly down to
~300 nm albeit not so much as silica cells.

John N. Cooper, Chemistry
Bucknell University
Lewisburg PA 17837-2005
jcooper@bucknell.edu
http://www.facstaff.bucknell.edu/jcooper
VOX 570-577-3673 FAX 570-577-1739