A paper lantern that ascends using hot-air buoyancy — the earliest hot-air balloon prototype. Demonstrates practical application of Archimedes' buoyancy principle.
孔明灯
Scientific Principle
Archimedes' buoyancy principle: F_buoyancy = ρ_cold × V × g; the lantern rises when F_buoyancy > F_gravity. Hot air density ρ ∝ 1/T(K).
