Quote:
Originally Posted by Piwoslaw
No no, I have a sun reflector which I deploy when parked. I'd only tint the windows behind the driver. Here, tinting the front glass is illegal, and the front side windows can't be tinted to less than 70%.
But I brought this up because I want to understand how making the glass darker actually keeps the heat out. I want the physics of it (well, at an advanced high school level).
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Oops, sorry, in my lengthy discussion I kind of skipped this one.
1.) The tint and window now absorbs more of the heat. This in turn is dissipated through driving because the wind cools the glass.
2.) Tint reflects heat. This comes down to the type of tint as I mentioned. Metal and ceramic components are used to reflect the heat.
Kind of like how a black tshirt gets hotter in the sun than a white tshirt.
So it's a combination of the two. The total solar energy rejection of the film is a good way to compare films based on which reject more heat.
Some films focus on the infrared spectrum too.