Solar and wind power P2

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But the heatedd things in a room emit infrared radiation of a longer wavelength, which can't escape through the glass-it's reflected back instead, just like in a greenhouse.
So this 'greenhouse effect' works to heat, and keep heat, inside a building.
The Light from the Sun has a short wavelength, so it can pass through the glass into a room.
Glass lets in light from the Sun,which is absorbed by things in a room, heating them up.