Chapter 26, Problem 015 A beam of light is traveling in air and strikes a materi

Question

Chapter 26, Problem 015 A beam of light is traveling in air and strikes a material. The angles of incidence and refraction are 56.1° and 35.5, respectively. Obtain the speed of light in the material. Number Units m/'s the tolerance is +/-6% LINK TO TEXT By accessing this Question Assistance, you will learn while you earn points based on the Point Potential Policy set by your instructor Question Attempts: Unlimited SAVE FOR LATERSUBMIT ANSWER Earn Maximum Points available only if you answer this question correctly in four attempts or less.

Explanation / Answer

given

theta_i = 56.1 degrees

theta_r = 35.5 degrees

n1 = 1 (for air)

let n2 = n (refractive index of material)

use Snell's law

sin(theta_i)/sin(theta_r) = n2/n1

sin(56.1)/sin(35.5) = n/1

n = sin(56.1)/sin(35.5)

= 1.429

we know, speed of light in the material, v = c/n

= 3*10^8/(1.429)

= 2.10*10^8 m/s <<<<<<<---------------Answer

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