Question

as shown in the figure below, a light ray is incident normal to one face of a 30-60-90 block of crown glass that is inmersed in glycerine

As shown in the figure below, a light ray is incident normal to one face of a 30-60-909 block of crown glass that is immersed in glycerine 50 (a) Determine the exit angle 8, of the ray (b) A substance is dissolved in the glycerine to increase the index of refraction ng At what value of n does total internal reflection cease at point Pr Show My Work s

Answer 1

A)

From figure, x1 - x2 = 30

Angle, x1 = 60 degree

Angle, x2 = 30 degree

Using Snell's law,

Sin(x3) = (1.47/1.33) sin30 = 0.553

Angle, x3 = 33.55 degree

B)

n2 = (n1 sin(x1))/sin(x2)

n2 = (1.47 x sin60)/sin90

n2 = 1.27

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