Geometrical Optics. Refraction, reflection at a spherical/planar interface Hecht, Chapter 5 Wednesday Sept. 11, 2002. Same for all rays. Independence of path. For any rays traveling from point S to another point P in an optical system the optical path lengths are identical!! . z. y. x. y.
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Refraction, reflection at a spherical/planar interface
Hecht, Chapter 5
Wednesday Sept. 11, 2002
θ1Refraction by plane interface& Total internal reflection
n1 > n2
Snell’s law n1sinθ1=n2sinθ2
Totally reflecting prism
sinα ≈ tan α ≈ α ; cos α = 1
nθ = n’θ’