LateralRiddle #1535
On humid summer mornings, Ray's living room windows are covered in fog. He wipes them from the inside again and again, and nothing changes. The glass is perfectly clean. Why?
Hint: Think about what runs inside all night.
Answer
His air conditioning keeps the glass cold, so the humid outdoor air fogs the outside of the window.
Condensation forms on whichever side of the glass meets the warm, humid air.
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