Can one get cancerous UV rays through window glass?
I know glass blocks some but not all types of UV rays and I was wondering if I should be wearing sunscreen while driving in my car when there is always sun coming through the windows.
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BlindPoet
on November 30th, -0001
Ordinary car window glass filters out ~100% of the UV-C radioation, about 97% of the UV-B radiation and about 37% of UV-A radiation.
It is approximately equivalent to a good sunscreen, which means that if you?re sitting in the sun during a long trip you could still get burnt.
Laminated windscreens block all of the UV-B radiation and over 80% of the UV-A radiation.
UV-A radiation is the least damaging and much less likely to cause skin cancer than B or C.
AgeingNature
on November 30th, -0001
Yes, an excellent idea since you can still get UV radiation even through tinted window glass.
Mayumi
on November 30th, -0001
yes, however, you can get UV-proof glass
BigBoy
on November 30th, -0001
YES
Gothicbunny
on November 30th, -0001
sidelites on cars are closer to 100% absorbance on the UVB (certainly absorbs all UVC). the UVA is a little higher as well. closer to 50%. realize, the absorbance of the glass is log as one goes down in wavelength. the sun does not emit every wavelength of light- it is spectral emission of He, H, and other elements. So, the assessment on what is absorbed is a little cloudy (love the pun).
Windshields absorb 100% A, B, and C radiation. they have a ton of UV absorbers in the middle, polymer layer.
Your question depends a little on where the sun comes from. Bigger question: since sidelite glass on a car and the windows in your home are the same glass composition (and absorbance), do you wear sunscreen when you are in your home????
My answer is ‘no’ for your question, and ‘no’ to my question.