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I'm curious if car windshields / windows block UV (ultraviolet) light, the one from either the sun, or UV flashlights, like the Convoy S2+ Nichia 365nm.
https://www.ncbi.nlm.nih.gov/pubmed/12925188 said:RESULTS:
UV wavelengths longer than >335 nm were transmitted through car windows, and UV irradiation >380 nm was transmitted through compound glass windscreens. There was some variation in the spectral transmission of side windows according to the type of glass. On the arms, UV exposure was 3-4% of ambient radiation when the car windows were shut, and 25-31% of ambient radiation when the windows were open. In the open convertible car, the relative personal doses reached 62% of ambient radiation.
CONCLUSIONS:
The car glass types examined offer substantial protection against short-wave UV radiation. Professional drivers should keep car windows closed on sunny days to reduce occupational UV exposure. In individuals with polymorphic light eruption, produced by long-wave UVA, additional protection by plastic films, clothes or sunscreens appears necessary.
Was it definitely the glass, or was it a coating on the glass?I bought a new car in February, and as the seasons changed I noticed it wasn't nearly as hot inside the car left in the sunshine as my previous car. I did some asking around and found out that the major difference is in the chemical makeup of the glass itself. So not only does it depend on the frequencies, it also depends on the make, model and age of the car.
I bought a new car in February, and as the seasons changed I noticed it wasn't nearly as hot inside the car left in the sunshine as my previous car. I did some asking around and found out that the major difference is in the chemical makeup of the glass itself. So not only does it depend on the frequencies, it also depends on the make, model and age of the car.
Yeah probably it was some anti-IR coating or higher glass thickness, because as far as I know UV does not cause heat, it's the IR mainly. Also, smaller windows or better bodywork insulation or better AC cooling system can lead you to think that.Was it definitely the glass, or was it a coating on the glass?
I know https://www.nsg.com/en/about-nsg/our-businesses/automotive/products with infrared reflective coating, which helps to keep the car cooler.
Not so. Read about the greenhouse effect.Yeah probably it was some anti-IR coating or higher glass thickness, because as far as I know UV does not cause heat, it's the IR mainly.
I thought glass was generally a better UV blocker than plastic.Very nice experiment that matches with manufacturing practice. Most car windows are made of tempered glass, which is just glass that is specially heat treated. The law requires windshields, however, to be made of laminate which has a plastic film sandwiched between two glass sheets. The plastic keeps the glass from shattering, and also absorbs UV light.
I thought glass was generally a better UV blocker than plastic.
I always found the colour of the car makes a big difference. Lighter cloured cars tend to not get as hot as darker coloured cars.
Not so. Read about the greenhouse effect.probably it was some anti-IR coating or higher glass thickness, because as far as I know UV does not cause heat, it's the IR mainly.