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AP Physics 2 · 15 Modern Physics

Half-life and activity for AP Physics 2

Half-life and activity is mapped to 15 Modern Physics in the AP Physics 2 pathway. Use this public guide to see exactly where the concept fits, what to master, and which GioPhysics resource continues the study sequence.

AP 2 · AP Physics 2: Algebra-Based12–15%Guide 6 of 7

Where this fits

15 Modern Physics

Curriculum
AP Physics 2
Theme or group
AP Physics 2: Algebra-Based
Current framework
2026–27 course year · May 2027 exam format

Photons, matter waves, and energy levels are Chapter 47; radioactivity and nuclear reactions are Chapter 46.

Mastery checklist

Know what success looks like.

  1. 01

    Define half-life and activity in precise physics language.

  2. 02

    Choose and apply the mapped relationship with symbols, units, and assumptions stated.

  3. 03

    Explain how the result fits the wider syllabus topic and test whether it is reasonable.

Exam lens

Build, apply, check.

15 Modern Physics is identified as 12–15% in this curriculum map. Build the concept first, then practise selecting a model, showing working, and checking the final result.

Teaching sequence

15 Modern Physics

This syllabus point maps to 7 ordered concept guides.

  1. 01The photoelectric effect
  2. 02Matter waves
  3. 03The Bohr model and energy quantisation
  4. 04Discrete energy levels and spectra
  5. 05Radioactive decay
  6. 06Half-life and activityCurrent guide
  7. 07Nuclear reactions and binding energy

Continue on GioPhysics

Choose the right next step.

The curriculum context stays public. Lesson and presentation access follows the existing GioPhysics membership rules.

LearnOpen the mapped lessonHalf-life and activityTeachOpen the presentationClassroom sequence for this conceptPractiseOpen problem applicationsEasy through expert problem pathwaysPlanOpen the full curriculum mapCollege Board AP Physics