Jinx glass won’t block all UV, nor will it block all IR. Or to put it another way it ain’t completely opaque to either wavelength.
You won’t readily tan or burn under glass, and you certainly won’t under tinted auto glass. However that’s because the intensity is too low to cause tanning, not because all the UV s being blocked. The retina isn’t protected by any melanin or a layer of dead epidermal cell s as the skin is. When you try you look at the sun even through glass the UV is going directly into living cells. That’ definitely not a good thing since UV denatures proteins and nucleic acids. Bad mojo. Don’t try it.
Glass is even less effective at stopping IR. The reason heat builds up inside a car is not directly related to the inability of IR from the sun to pass through glass. If that were the cause then the inside of the car would be cooler since the IR light from the sun would be reflected back into the atmosphere and could never enter the car.
The reason a car heats up in the sun is because of the greenhouse effect. Light from the sun is largely visible and short wavelength IR light, both of which pass through glass quite readily. These wavelengths strike the car interior and the air within the car and energise the atoms within them. These energised atoms then re-emit long wavelength IR light as they cool down. This long wavelength IR can’t pass through glass and is trapped inside the car. As a result heat builds up steadily.
So it’s long-wavelength IR light that can’t pass through glass, not short wavelength. Long wavelength IR is lower energy light and is emitted from relatively cool sources such as animal bodies, warm stones and fires. The sun is definitely not a cool object and it emits copious amounts of short wavelength IR light that will go through glass without stopping. Looking at the sun through normal glass will result in a Ranier Wolfcastle moment:
“The goggles do nothink.”
The sun also emits a lot of long wavelength IR along with every other part of the spectrum but that’s irrelevant to this discussion.