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stoky
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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?OldYat47 said: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.
OldYat47 said: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.Vagn said: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.stoky said: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.marcusl said: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.
Michael Price said:I thought glass was generally a better UV blocker than plastic.
MikeeMiracle said: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.
Glass transmits near infrared light, such as infrared radiation from the Sun. In contrast, glass blocks long wavelength infrared radiation, such as thermal radiation from the ground in the greenhouse.marcusl said:Not so. Read about the greenhouse effect.stoky said: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.
Yes, some UV light can pass through car windows and windshields. The amount of UV light that passes through depends on the type of glass used and its level of tinting or UV protection.
Yes, UV light can still cause damage to skin and eyes while inside a car. This is because some UV rays can still enter through the windows and windshields, and the amount of UV protection provided by the glass is not enough to completely block out the harmful rays.
You can protect yourself from UV rays while driving by using sunscreen on exposed skin, wearing UV-blocking sunglasses, and installing UV-protective film on your car windows and windshields. You can also choose to park in shaded areas or use a sunshade in your car to reduce UV exposure.
No, not all cars have UV-protective glass. Some cars may have a higher level of UV protection than others, but it ultimately depends on the manufacturer and the type of glass used.
Yes, UV rays can cause damage to the interior of a car over time. This can include fading or discoloration of the upholstery, dashboard, and other surfaces. Installing UV-protective film on your car windows and windshields can help prevent this type of damage.