NSW SENIOR CLASS 11, 12 NOTES HUB | EDUNES
Physics | Chemstry | Biology | Mathematics
Physics Module 3: Submodule 1 — Wave Properties
Explore the fundamental characteristics of waves, distinguishing between mechanical and electromagnetic waves. Learn to model transverse and longitudinal oscillations both graphically and mathematically to understand how waves transfer energy through space and time.
Topics Covered
- Mechanical vs. Electromagnetic Waves
- Transverse and Longitudinal Vibrations
- Displacement-Distance and Displacement-Time Graphs
- The Wave Equation ($v = f\lambda$) and Period Relationships
Learning Outcomes
- Distinguish wave types based on direction of oscillation and medium requirements
- Extract and interpret amplitude, wavelength, and period from wave graphs
- Solve quantitative problems involving wave speed, frequency, and period
Practice Activities
- Wave graph interpretation worksheets
- Wave equation ($v = f\lambda$) calculation drills
- Slinky and ripple tank simulation modeling
Physics Module 3: Submodule 2 — Wave Behaviour
Investigate how waves interact with boundaries, shift when transitioning between different media, and influence each other upon contact. This submodule establishes the physical principles governing reflection, refraction, diffraction, and the superposition of waves.
Topics Covered
- Fixed and Free Boundary Reflection
- Refraction and Snell's Law ($\frac{v_1}{v_2} = \frac{\lambda_1}{\lambda_2} = \frac{\sin(\theta_1)}{\sin(\theta_2)}$)
- Diffraction Apertures and Slit-Width Relationships
- Superposition, Constructive, and Destructive Interference
Learning Outcomes
- Predict phase changes when a wave pulse encounters rigid or free boundaries
- Quantify changes in wave velocity, wavelength, and direction during refraction
- Explain how wavelength dictates the scale of diffraction through a gap
- Construct resultant wave profiles using the principle of superposition
Practice Activities
- Snell's Law and refractive index problem sets
- Superposition vector-addition graphing exercises
- Wavefront boundary condition simulation tasks
Physics Module 3: Submodule 3 — Sound Waves
Apply core wave mechanics directly to sound, a longitudinal mechanical wave. This submodule explores how physical wave properties dictate human perception, the mechanics of standing waves in pipes and strings, and the acoustic phenomena used in modern tracking and engineering.
Topics Covered
- Nature of Sound, Pitch (Frequency), and Loudness (Amplitude)
- The Doppler Effect Formula ($f' = f \left( \frac{v_{\text{wave}} \pm v_{\text{observer}}}{v_{\text{wave}} \mp v_{\text{source}}} \right)$)
- Standing Waves, Resonance, Nodes, and Antinodes
- Air Columns (Open & Closed Pipes), Stretched Strings, and Harmonics
- Sound Intensity and the Inverse-Square Law ($I = \frac{P}{4\pi r^2}$)
Learning Outcomes
- Relate qualitative auditory perceptions of sound to quantitative wave features
- Calculate apparent frequency shifts for moving sources and observers using the Doppler equation
- Model and solve for fundamental frequencies and higher harmonics in musical acoustic systems
- Predict how sound intensity diminishes over a specific distance from a point source
Practice Activities
- Doppler effect directional sign and frequency calculations
- String and pipe harmonic boundary condition drawing drills
- Inverse-square law acoustic intensity word problems