Safety boundary
Use simulations, printed optics, and eye-safe light only. Do not direct lasers or intense light at people.
Explicit physics instruction
Electromagnetic communication combines a physical carrier with encoding, transmission, interaction with matter, and decoding.
A strong model identifies which quantity carries information, which physics controls propagation, and which metric evaluates fidelity.
Engineering choices trade among power, bandwidth, range, resolution, robustness, and safety.
Vocabulary: carrier; encoding; propagation; fidelity; tradeoff.
Worked example
A radio system can use frequency/wavelength physics to choose a carrier while a digital code determines how information is represented on that carrier.
Guided question
Design a simple communication model from source to receiver and label where noise or loss can enter.
Independent work
- Solve one EM-wave calculation.
- Interpret one optics diagram.
- Analyze one digital-error dataset.
- Write one design tradeoff.
Spiral retrieval bridge
- From Week 31: explain how changing flux can produce emf.
- From Week 24: apply v=fλ.
- From Week 29: distinguish electric field from electric potential.
Misconception check
Wave carrier physics and information encoding are related layers, not the same thing.
Formative check
What two layers must a communication explanation distinguish?
Reveal response
Physical propagation and information encoding/decoding.
Mentor evidence conference
Ask Archaemenes to audit wave variables, encoding assumptions, metrics, and model limits.
Teacher guidance
Foundation: Use a source-channel-receiver diagram.
Core: Integrate wave and information reasoning.
Extended: Evaluate tradeoffs among range, bandwidth, and robustness.