Hello everyone. I was just curious if aluminum foil could block the sun's UVA rays. I have my home office and the sun always gets in and hits me. I know sunlight can cause early photoaging and cancers, so I want to block out as much UVA rays as possible. I do wear sunscreen, but I prefer blocking it another way while I'm in my home office. Wearing sunscreen in my house all day is not my cup of tea (it dries me). I'm planning on making a sort of little shield made of Aluminum Foil that I can put right next to my desk, and angle it so that it protects me from the sun's UVA rays. I'm not a physics person and I work in statistics, so I forgot most high school physics. So I basically would love to know if Aluminum Foil is enough to block away the sun's UVA rays??? If not, then what else could block them??? Thank you all.