Prism Minimum Angle of Deviation Calculator

Prism Minimum Angle of Deviation Calculator

Calculate the minimum deviation angle using: $$ \delta_{\text{min}} = 2\sin^{-1}\Bigl(n\,\sin\Bigl(\frac{A}{2}\Bigr)\Bigr) – A $$

* Enter the apex angle \(A\) in degrees and the refractive index \(n\).

Step 1: Enter Prism Parameters

e.g., 60°

e.g., 1.5

Formula: $$ \delta_{\text{min}} = 2\sin^{-1}\Bigl(n\,\sin\Bigl(\frac{A}{2}\Bigr)\Bigr) – A $$
(with \(A\) in degrees and \(\delta_{\text{min}}\) output in degrees)