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So when I roll down a car window and feel the radiant heat of the sun more intensely than when the window is up, is that difference primarily due to the glass f
by hunter2_ 3y ago
So when I roll down a car window and feel the radiant heat of the sun more intensely than when the window is up, is that difference primarily due to the glass filtering UV or IR?
- sandworm101 3y agoMuch automotive glass filters (reflects) IR, and also absorbs UV. Each UV ray is "higher energy" but the sun pumps out vastly more IR than UV. You cannot immediately feel the UV on your skin, not until it gives you a sunburn. You are feeling the IR that was previously blocked by the automotive glass. Interestingly, glass on military vehicles generally does not filter IR. You need IR if you ever want to use nightvision equipment.