20 August
GeoGebra link: https://www.geogebra.org/m/hzfyjejx
GeoGebra link: https://www.geogebra.org/m/jmqytcsc
20 August
In order to help students visualise a wavefront, a 3-D image is usually used to show the imaginary line joining particles in phase. I created the GeoGebra apps below to allow students to change the wavefront and observe it move with time at a constant wave speed. There represent simplified versions of waves on a ripple tank with a linear and circular wavefront.
Linear Wavefront
A wavefront for a linear wave is a straight line that represents points of equal phase, typically generated by a plane wave source. These wavefronts are parallel to each other and move in a uniform direction as the wave propagates.
GeoGebra link: https://www.geogebra.org/m/rbjcszuc
Rotating the first waveform, you can get the displacement-distance profile of a wave, which is basically the cross-section of a 3-D wave.
Circular Wavefront
A wavefront for a circular wave is a continuous line or curve that represents points of equal phase, emanating outward from a central source. In a two-dimensional medium, these wavefronts are concentric circles that expand as the wave propagates away from the source.
GeoGebra link: https://www.geogebra.org/m/axdhtccg
12 August
GeoGebra link: https://www.geogebra.org/m/f7faw3r6
This simple Geogebra app allows students to observe the oscillation of a particle perpendicular to the direction of energy transfer.
09 August
This Geogebra app allows students to explore how the position of the centre of gravity as well as the width of its base affect the stability of an object.
07 August
This animation is made using Geogebra. It shows the instantaneous velocity and displacement vectors of a particle undergoing simple harmonic motion while tracing its position on the velocity-displacement graph. It is meant to help student understand why the graph is an ellipse.
26 February
This simulation traces the flux linkage and corresponding emf generated by a rectangular coil rotating along an axis perpendicular to a uniform magnetic field. One is able to modify the angular frequency to see the effect on the frequency and peak emf generated.
https://ejss.s3-ap-southeast-1.amazonaws.com/faradayslaw_Simulation.xhtml