Wave phenomena, Fourier analysis, and oscillatory motion
27 May 2026
Explore how low-pass and high-pass filters work with an interactive simulation — from RC circuits and cutoff frequencies to Butterworth filter design.
24 Apr 2026
Interactive wave equation calculator — adjust frequency and wavelength to see how wave speed changes, with live animation and frequency spectrum.
7 Apr 2026
Build a noisy signal from multiple frequencies, then use the Fast Fourier Transform to recover the original — see denoising in action.
26 Mar 2026
Why does an ambulance siren drop in pitch as it passes you? Visualise the Doppler effect — wavefront compression ahead of a moving source, rarefaction behind it — with adjustable source speed and interactive spectral shifts.
20 Feb 2026
Build complex waveforms from harmonics — stack sine waves to construct square, sawtooth, and triangle waves and see how Fourier series works in real time.
10 Feb 2026
Explore quantum wave packets — see how superposing plane waves creates a localised particle, and discover Heisenberg's uncertainty principle through the interactive dispersion and group velocity controls.
20 Jan 2026
Explore Lissajous figures — beautiful parametric curves traced by two perpendicular harmonic oscillators. Adjust frequency ratio and phase to see patterns shift from lines to ellipses to knots.