Description
Uses an oscillator to generate standing waves in a string. Length, string tension and driving frequency can be adjusted. Mass of string is calculated.
Outcomes:
- Observe and understand resonance.
- Observe, measure and manipulate standing waves in different harmonics.
- Understand how the principle of superposition relates to standing waves.
- Develop an understanding of the relationship between the mass and tension of a medium and the frequency, wavelength and velocity of a wave in that medium.
Links to Stage 6 Physics Syllabus Content
PH11-10/Wave properties:
- Conduct a practical investigation involving the creation of mechanical waves in a variety of situations in order to explain:
- The role of the medium in the propagation of mechanical waves.
- The transfer of energy involved in the propagation of mechanical waves (ACSPH067, ACSPH070).
- Construct and/or interpret graphs of displacement as a function of time and as a function of position of transverse and longitudinal waves, and relate the features of those graphs to the following wave characteristics:
- Velocity
- Frequency
- Period
- Wavelength
- Displacement and amplitude (ACSPH069)
- Solve problems and/or make predictions by modelling and applying the following relationships to a variety of situations:
PH11-10/Wave Behaviour:
- Explain the behaviour of waves in a variety of situations by investigating the phenomena of:
- Reflection
- Wave superposition (ACSPH071, ACSPH072)
- Conduct an investigation to distinguish between progressive and standing waves. (ACSPH072)
- Conduct an investigation to explore resonance in mechanical systems and the relationships between:
- Driving frequency
- Natural frequency of the oscillating system
- Amplitude of motion
- Transfer/transformation of energy within the system (ACSPH073)
PH11-10/Sound waves:
- Investigate and model the behaviour of standing waves on strings and/or in pipes to relate quantitatively the fundamental and harmonic frequencies of the waves that are produced to the physical characteristics (eg length, mass, tension, wave velocity) of the medium. (ACSPH072)