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Chapter 35: Q. 20 (page 1017)

A sheet of glass has nred=1.52 and nviolet=1.55. A narrow beam of white light is incident on the glass at 30掳. What is the angular spread of the light inside the glass?

Short Answer

Expert verified

The angular spread of the light inside the glass is0.39掳.

Step by step solution

01

Given Information.

We have given the refractive indexnred=1.52andnviolet=1.55.

We need to find the angular spread of light inside the glass.

02

Diagram

03

Calculation.

n1sin蟽1=nRsin蟽R

蟽R=sin-1(n1sin蟽1nR)=19.20

n1=1.00

蟽1=30

nR=1.52

蟽V=sin-1(n1sin蟽1nV)=18.82cw

n1=1.00

蟽1=30

nV=1.55

蟽=蟽R+蟽V=19.20掳-18.82掳=0.385掳

Here nis the refractive index and 蟽is the refractive angle.

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