Question

Question Completion Status QUESTION 3 You are performing a lab experiment: a ray of light is incident at the surface between two transparent materials. You notice that there is no transmitted ray. Tracing the rays and the surface you have the following picture. What can you tell about the indices of refraction of the two transparent materials? O n2 > n1 ○ n1 > n2 On2 = n1 QUESTION 4 As optical engineer, you want to determine the critical angle at the interface between one new material and the air. The speed of light in the material is 0.3c. The critical angle O 20° O 11° O 14° O 170 k Save and Submit to save and submit. Click Save All Answers to save all answers.

Answer 1

1) since there is no refracted ray , the index of refraction is same for both material to

n1 = n2 is the correct answer

2) index of refraction = speed of light in vacuum /speed of light in medium

                             = c/ 0.3c

                             = 3.33

using the equation

n1 sin i = n2 sin r

3.33 sin i = 1* sin 90

i = 17.45^o

so last option is the correct answer