Unit 6 • Optics

6.1 — Reflection

Light follows rules. Reflection is the “bounce” that lets us see mirrors, shine, and images.

🖼️ One-Page Visual Summary (Infographic)
6.1 Infographic

🧭 Plot Summary

Reflection is what happens when light hits a surface and changes direction without passing through it. This lesson focuses on the core rule of reflection: the incoming and outgoing angles are equal, measured from the normal.

You’ll use the “ray model” of light to explain how images form in mirrors and why a smooth surface makes a clear image while a rough surface scatters light and blurs what you see.

Why it matters:

Reflection is the foundation of mirrors, periscopes, cameras, and many optical devices. Once you can track rays correctly, you can predict what an observer will see — and why.

🔎 Detailed Lesson Overview

Inside: detailed explanations, graphical relationships, mathematical reasoning, and guided practice.

✅ Self-Check

  • ◻ I can state the law of reflection in words.
  • ◻ I can identify incident ray, reflected ray, and the normal line.
  • ◻ I can explain specular vs. diffuse reflection.
  • ◻ I can use ray diagrams to predict where light will go.

🧪 Graded Assessments

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