For a thin prism of small refracting angle A and refractive index n, t…

Question

For a thin prism of small refracting angle A and refractive index n, the deviation δ is approximately

Accepted Answer

A. δ = (n − 1) A

1. For a thin prism, deviations at the two faces add; small-angle approximation gives sin θ ≈ θ.
2. The result is δ ≈ (n − 1) A.
3. This is the basis of dispersive power formulas.
_Source: syllabus Physics Part II, Ch 9 §9.6_

Answer

δ = A / (n − 1)

Answer

δ = A × n²

Answer

δ = (n + 1) A

For a thin prism of small refracting angle A and refractive index n, the deviation δ is approximately

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