Chapter 5 fits the dispersion of BK7 crown glass with the Cauchy relation

PHYSICS · Subjective · Fermi University Physics · Optics & Photonics · Wave propagation and light in media · Wave propagation and light in media

Optics and Photonics, Ch Reflection and transmission at interfaces

Problem

Chapter 5 fits the dispersion of BK7 crown glass with the Cauchy relation n(λ)=A+B/λ2n(\lambda) = A + B/\lambda^2, with A=1.5046A = 1.5046 and B=0.00420 μm2B = 0.00420\ \mu\text{m}^2 when λ\lambda is measured in micrometres. Find Brewster's angle for light incident from air onto a BK7 surface at two wavelengths often used to characterise a glass, λF=486.1\lambda_F = 486.1 nm and λC=656.3\lambda_C = 656.3 nm. By how much does Brewster's angle differ between these two wavelengths?

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