Subject: How Can I Test Sunglasses for Their Effectiveness in Blocking UVA and UVB

I am thinking about testing various types and price levels of sunglasses as to 
their effectiveness in blocking UVA and UVB radiation, as compared to the 
claims they make, and considering their cost to see what the best deal is. Is 
there a relatively simple way of determining how much of the UV rays get 
through or are blocked without sophisticated and/or costly equipment? This 
would be for my middle school science fair project.

Re: How Can I Test Sunglasses for Their Effectiveness in Blocking UVA and UVB