आसमान में प्लेन ये सफेद लाइन क्यों छोड़ते हैं?
Have you ever looked up and noticed airplanes leaving long white lines in the sky? ✈️
Many people think it’s some kind of chemical spray — but is that really true?
These white lines are called **contrails** (short for condensation trails). They form when hot exhaust from an aircraft engine meets extremely cold air at high altitudes. The water vapor freezes into tiny ice crystals, creating those visible white streaks.
In this video, we reveal the real science behind it — no myths, just facts!
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