Question Detail
Question
What is the refractive index of the glass? (Based on a diagram of a ray of monochromatic light passing through a semi-circular glass block.)
Correct Answer
Option D is the correct answer.
Detailed Explanation
The refractive index (n) is calculated using Snell's law: n = sin(i) / sin(r). From the diagram, the angle of incidence (i) is 60° and the angle of refraction (r) is 30°. Therefore, n = sin(60°) / sin(30°) = 0.866 / 0.5 = 1.732, which is approximately 1.56.
Hint
Use Snell's law. The ray appears to be entering from air into glass. Identify the angles of incidence and refraction from the diagram.