Testing Sunscreen Effectiveness
Sunscreen effectiveness?
ok so i have a science project due in a few days, and im supposed to test the effectiveness of sunscreen by rubbing some on saran wrap and holding it up to teh sun and taking a uv indicator and putting it underneath and seeing the difference from the control(just the saran wrap) but every time i do it i just get a uv rating of 0. i am really in deep s%&@ and was wondering if anyone could tell me either what the ratings are supposed to be, or if im doing something wrong.
here is the link to the site i got my project idea from
http://www.sciencebuddies.org/science-fair-projects/project_ideas/MatlSci_p015.shtml
Ultraviolet (UV) light is invisible to our eyes, and has higher energy than visible light. “When considering the effect of UV radiation on human health and the environment, the range of UV wavelengths is often subdivided into UVA (400–315 nm), also called Long Wave or ‘blacklight’; UVB (315–280 nm), also called Medium Wave; and UVC (< 280 nm), also called Short Wave or 'germicidal'." (Wikipedia, 2006)
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Tags: fair, science, testing sunscreen effectiveness, uv
