[Verse 1] Thomas Young set up his screen in eighteen-oh-four Two narrow slits carved side by side Single photons fired one at a time Created zebra stripes of interference pride When both paths stayed open wide The waves would crash and coincide [Chorus] Wave or particle, which will it be? Depends upon what you choose to see Quantum duality, nature's mystery Photons and electrons switch identity Wave when unobserved, particle when caught The act of measurement changes what you thought [Verse 2] Close one slit and watch the magic disappear No more fringes, just a blur But open both and step away The pattern's back to stay Each photon somehow knows the score Taking every path and more [Chorus] Wave or particle, which will it be? Depends upon what you choose to see Quantum duality, nature's mystery Photons and electrons switch identity Wave when unobserved, particle when caught The act of measurement changes what you thought [Bridge] De Broglie said all matter waves With wavelength inversely tied to mass Electrons surf through crystal caves Probability clouds that never last Until you peek and make them crash [Verse 3] Heisenberg warned us of the price we pay To know position kills momentum's dance Or catch the speed but lose the place Complementarity's strange romance The quantum world won't show both faces Observer effect leaves only traces [Final Chorus] Wave or particle, which will it be? The universe keeps its mystery Superposition until we peek Reality's the game of hide and seek Wave when unobserved, particle when caught Measurement collapses what cannot be taught [Outro] Young's double slits still mystify The quantum threat we can't deny Both and neither, that's the key To quantum duality
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