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In this paper we examine more deeply about the bending mechanism ofrod-shaped fireworks which burned from the free end. We derived new analyticequations. Surprisingly, we obtained the bending patterns are similar to thecornu spiral. With a few simple steps we proved that positions of pointsthroughout the fireworks are given by Fresnel integrals, C(x) and S(x), whichare generally found in phenomena of electromagnetic wave diffraction. Althoughwe deeply discussed bending of fireworks rods, however the proposed method islikely to explain any phenomena in nature related to an evolving length scaleassociated with some material that becomes progressively stiff or dry, such asthe growth of resin exuded from trees.

Analytical Solutions for Bending Of Fireworks and Similarities with the Solution of Electromagnetic Wave Diffraction