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Essential idea: All waves can be described by the same sets of mathematical ideas. Detailed knowledge of one area leads to the possibility of prediction in another.
Nature of science:
Imagination: It is speculated that polarization had been utilized by the Vikings through their use of Iceland Spar over 1300 years ago for navigation (prior to the introduction of the magnetic compass). Scientists across Europe in the 17th–19th centuries continued to contribute to wave theory by building on the theories and models proposed as our understanding developed. (1.4)
Understandings:
Wavefronts and rays
Amplitude and intensity
Superposition
Polarization
Applications and skills:
Sketching and interpreting diagrams involving wavefronts and rays
Solving problems involving amplitude, intensity and the inverse square law
Sketching and interpreting the superposition of pulses and waves
Describing methods of polarization
Sketching and interpreting diagrams illustrating polarized, reflected and transmitted beams
Solving problems involving Malus’s law
Guidance:
Students will be expected to calculate the resultant of two waves or pulses both graphically and algebraically
Methods of polarization will be restricted to the use of polarizing filters and reflection from a non-metallic plane surface
Data booklet reference:
Theory of knowledge:
Wavefronts and rays are visualizations that help our understanding of reality, characteristic of modelling in the physical sciences. How does the methodology used in the natural sciences differ from the methodology used in the human sciences?
How much detail does a model need to contain to accurately represent reality?
Utilization:
A number of modern technologies, such as LCD displays, rely on polarization for their operation
Aims:
Aim 3: these universal behaviours of waves are applied in later sections of the course in more advanced topics, allowing students to generalize the various types of waves
Aim 6: experiments could include (but are not limited to): observation of polarization under different conditions, including the use of microwaves; superposition of waves; representation of wave types using physical models (eg slinky demonstrations)
Aim 7: use of computer modelling enables students to observe wave motion in three dimensions as well as being able to more accurately adjust wave characteristics in superposition demonstrations
Energy of a Wave
Energy of a Wave
In class Opportunities
Does listening to loud musics drain your battery faster?
Relating Amplitude, Energy of a Wave and MOS - Class Discussion
Speed of waves and the medium they pass through
From your microphone data:
Data Analysis
Plot a graph of distance (y-axis) against time (x-axis). The speed of sound can be found from the gradient of the line of best fit.
Intensity of Light - Experimental vs Simulation Data.
Simulation Data - Flux Simulator - Instructions
Experimental Data - Light Brightness and Intensity
Light Intensity and Energy
Light Intensity and Energy
Graphical Methods
How do we create linear graphs from our data?
Spreadsheet of Data (you will need to make a copy)
Work on data analysis or wave problems from section 4.1-4.3.
Wave Superposition
Wave Superposition
Desmos Waves - Creating models of wave interference.
Gravitational Waves and Superposition - Interferometers - the ACTUAL DATA!!!! - LIGO/VIRGO
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