Physics 1

Unit 6: Optics

Reflection • Mirrors • Refraction • Lenses

Lessons in this Unit

6.1 — Reflection6.2 — Mirror Images6.3 — Refraction6.4 — Lens Images

Unit 6 Snapshot

In Unit 6, you investigate how light behaves when it interacts with surfaces and materials. You’ll use the law of reflection, reason about mirror images, explain refraction using index of refraction ideas, and predict image location and characteristics for lenses.

  • Apply the law of reflection to predict ray paths.
  • Interpret image properties produced by mirrors.
  • Explain refraction and bending of light through materials.
  • Use lens concepts to analyze where images form and what they look like.

Complete Lessons 6.1–6.4 in order, then use the review, rework option, if needed, and ACT practice to prepare for the summative challenge.

Review & Practice

📚 Unit Review

Unit 6 Review — Concepts & Key Relationships

📝 Rework / Regrade

Unit 6 Rework — Improve Your Score

✅ ACT Practice

ACT #1 — Reflection & RaysACT #2 — Refraction & MediaACT #3 — Mirrors & Lenses

Summative Assessment

When you have completed the lessons, unit review, rework, if needed, and ACT practice, you are ready for the Unit 6 summative challenge.

Open Unit 6 Summative Challenge — Sun Pencils