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Q 58

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 993

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Short Answer

There’s one angle of incidence onto a prism for which the light inside an isosceles prism travels parallel to the base and emerges at angle .

a. Find an expression for in terms of the prism’s apex angle and index of refraction .

b. A laboratory measurement finds that = 52.2° for a prism shaped like an equilateral triangle. What is the prism’s index of refraction?


b) Refractive index is equal to 1.58

See the step by step solution

Step by Step Solution

Step 1. Given information is :a)Angle of incidence of light ray is Prism's apex angle is Refractive index of air n1 = 1.0Refractive index of Prism n2 = b) for a prism that is shaped as an equilateral triangle.

We need to find out :

a) Expression of in terms of

b) Refractive index of prism with

Step 2. Part a) Using Snell's Law for Air-Prism Interface

Using Figure, we can write as :

Substituting the value in equation 1.


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