---
title: "A semicircular block of transparent glass with an index of refraction \\(n = 1.5\\) is surrounded by air (\\(n = 1.0\\)). A narrow beam of monochromatic light traveling in air is directed at the exact center of the flat surface of the block at an incident angle of \\(45^\\circ\\) relative to the normal. Which of the following ray diagrams best represents the path of the light ray as it enters the block at the flat interface and emerges through the curved boundary into the air?"
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url: "https://nerd-notes.com/ubq/123408/"
date_modified: "2026-09-28T11:58:23+00:00"
---

# A semicircular block of transparent glass with an index of refraction \(n = 1.5\) is surrounded by air (\(n = 1.0\)). A narrow beam of monochromatic light traveling in air is directed at the exact center of the flat surface of the block at an incident angle of \(45^\circ\) relative to the normal. Which of the following ray diagrams best represents the path of the light ray as it enters the block at the flat interface and emerges through the curved boundary into the air?

A semicircular block of transparent glass with an index of refraction \(n = 1.5\) is surrounded by air (\(n = 1.0\)). A narrow beam of monochromatic light traveling in air is directed at the exact center of the flat surface of the block at an incident angle of \(45^\circ\) relative to the normal. Which of the following ray diagrams best represents the path of the light ray as it enters the block at the flat interface and emerges through the curved boundary into the air?

- **A.** Diagram A
- **B.** Diagram B
- **C.** Diagram C
- **D.** Diagram D

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/123408/*