Um tiquinho de Física on Instagram: "This simulation demonstrates Klein Tunneling, a counter-intuitive phenomenon governed by the Dirac Equation. Unlike non-relativistic quantum mechanics, where a particle decays exponentially inside a potential barrier higher than its energy (V>E), a relativistic electron can propagate undamped through a sufficiently strong barrier by coupling to negative energy states (effectively acting as a positron). Using a custom Python Split-Operator (FFT) solver, I mode