Answered: n. Figure P22.26

Science

Physics

n. Figure P22.26

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter25: Gauss’s Law

Section: Chapter Questions

Problem 2PQ

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Concept explainers

Dispersion of White Light

Snell’s law is a formula that gives a relation between the angle of incidence and angle of refraction and is given as:

Question

Figure P22.26 shows a light
ray incident on a series
of slabs having different
refractive indices, where
n ₁ < n₂ < n ₃ < n ₄. Notice
that the path of the ray
steadily bends toward the
normal. If the variation
in n were continuous, the
path would form a smooth
curve. Use this idea and a ray diagram to explain why you can
see the Sun at sunset after it has fallen below the horizon.

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