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diffraction and interference here
Polarisation.
Everyday examples, e.g.
• radio waves
• waves at sea
• seismic waves.
Simple demonstrations using slinky, ripple tank, microwaves, or other suitable method.
Stationary waves; relationship between inter-node distance and wavelength.
Diffraction effects
• at an obstacle
• at a slit
with reference to significance of
the wavelength.
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