UV Exposure in Cockpit through Acrylic Canopies
"I noticed the other day that my transition lenses were ~half tinted
while flying in some sun inside my air conditioned LIVP at FL210, so UV must be
penetrating the thick acrylic canopy material. This is not the case inside
a car."
Don't forget that UV levels increase about 2% with
every 1000' rise in altitude. At FL210 the UV level will be about 40%
higher than at sea level. If you could drive your car at 21,000' you might
see some change in your transition lenses.
Tom Gourley
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