Which outcome occurs during the derivation of the paraxial wave equation when employing small-angle approximations in a lens system?

💡 Explanation

The small-angle approximation simplifies trigonometric functions, allowing a simpler differential equation for beam propagation because it linearizes the wave equation. Therefore, the mathematical model becomes simpler, rather than introducing complexities or impacting effects differently, as the paraxial approximation streamlines the analysis.

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