“thermal” windshield covers?
Question by The Oldest Man In The World: “thermal” windshield covers?
I always though when thermal radiation passes through glass, and then hits a thermal barrier, it just bounces back and forth having nowhere to go. Does that nullify the silver “bubble wrap” concept? Aren’t you just creating a small “greenhouse effect” tween the windshield and the “bubble wrap?
Best answer:
Answer by SmartAZ
Thermal radiation of a certain wavelength passes through glass. After the radiation is absorbed by something, it reradiates at a longer wavelength (lower temperature) and glass is opaque to that wavelength. A reflective surface is not a “barrier”, it simply reflects the heat at the same wavelength.
Know better? Leave your own answer in the comments!
JVZoo Product Feed
No, sunlight that hits a dark color turns in to heat. The sliver windshield cover reflects the light before it has a chance to turn into heat. The reflected light does not bounce back and forth unless the glass is tinted.
The greenhouse effect has to do with ‘absorbing thermal infrared radiation’. The glass in the windshield and the silver windshild cover should not absorb thermal infrared radiation. A little heat is generated between them.
The inside of my car is black. My car is a little cooler when I use the windshield cover.