why the airoplane windows get hot by direct sunlight ?

Question

when the airoplane fly high over in the sky while the outside temperature is very low even below zero ?

Answer 1

The effect you've observed is caused by three facts: The windows of commercial passenger jets are double-paned with an air gap between them. Only the outside pane is exposed to to the high altitude environment. Secondly, the windows are made of either acrylic (Plexiglas), or polycarbonate (Lexan). Both those plastics have a very low specific heat, compared to ordinary glass. This means a given amount of heat (calories) will raise them to a higher temperature. Lastly, 2/3 of the Earth's atmosphere is below 30,000 feet, so solar radiation is much more intense at altitude.

It's very observant of you to notice this effect. When the Boeing 707 was first developed, airframe flexibility and window heating combined to cause the plane's windows to inexplicably blow out, resulting in near-explosive decompression. Hundreds of people were killed and it was a big engineering mystery as to what went wrong. Relax -- the mystery was solved about fifty years ago.

Answer 2

From radiated heat of the sun(at high altitude above the cloud ceiling flight) or due to friction of air against the window at low altitude high speed in summer.

Answer 3

well this simple the reason for this is the aeroplanes windows are made of a material that is a good absorbant of sunlight and retains it for along time. the added advantage of this is since all solids expand on heating this makes the window more tight.

Answer 4

Invisble infrared radiation in the sunlight is absorbed by the glass causing heating effect.

Answer 5

Well Ur Question Is Ur Answer

Answer 6

the sun is hot