Subject: How long does UVA protection from sunscreen last?
Date: Tue Jun 30 22:21:51 2009
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Grade level: undergrad
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Area of science: General Biology
I know that SPF is a measure of how much longer it would take someone to burn in the sun with UVB
If I typically burned within 10 minutes in the sun, SPF 15 would make that 150 minutes instead of 10.
that is just for UVB rays. How long does UVA protection last throughout the day, given any standardized
measuring unit? Or does protection against UVA last all day, unlike UVB protection?
Re: How long does UVA protection from sunscreen last?
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