Harmonics of Open and Closed Pipes
The following GeoGebra interactives demonstrate the first few harmonics of an open pipe and a closed pipe given a fixed velocity of sound (340m/s). The frequencies and wavelengths...
11 Superposition
Pressure Nodes and Antinodes
Access in full screen here: https://www.geogebra.org/m/xbknrstt I modified the progressive sound wave interactive into a stationary wave version. This allows students to visualise...
Noise-cancelling AirPod Pro
The recently launched Apple AirPod Pro presents a wonderful opportunity to relate an A-level concept to a real-world example - how noise-cancelling earphones work. Apple's website...
Phase Difference GeoGebra Apps
I created a series of GeoGebra apps for the JC topics of Waves and Superposition, mainly on the concept of Phase Difference. The sizes of these GeoGebra apps are optimised for...
Chladni Plates
A very good explanation of standing waves on Chladni plates. Watch out for the 3-Dimensional standing wave at 3'11''.
Microwave Standing Waves
In the last tutorial, we were talking about the typical wavelength of different categories of electromagnetic waves. To help us remember the typical wavelength of microwaves, I...
Pressure Variation in Stationary Sound Waves
For sound waves, we learnt that the compressions (position of maximum pressure) and rarefactions (minimum pressure) occur at the equilibrium position of the displacement of...
Single Slit Diffraction using Fingers
This demonstration requires no material other than your own fingers. Hold your index and middle fingers close to each other, leaving a small slit between them about 1 mm in width....
Measuring Speed of Sound
Outline for Measuring the Speed of Sound Using a Tuning Fork and a Hollow Pipe Submerged in Water: Equipment Setup : Obtain a tuning fork of known frequency and a hollow pipe that...