Class practical: The demonstration models the process of sampling an analogue signal at regular intervals in order to encode...
Class practical: Students derive the wave equation, by closely observing ripples in a ripple tank.
The aim of this activity is to reinforce the relationship between pitch and frequency, and to give some feeling for the...
To find the frequency you simply count the number of vibrations each second. An alternative way to do the counting is to find...
The frequency of a visible photon is measured in terahertz ( 400–700 terahertz ). The energy of such photons is measured in...
The two identical bottles vibrate at the same natural frequency. So when one vibrates and produces a note, this makes the...
The hand stroboscope is a disc of hardboard or card with a simple pivot at its centre, so that the disc can be kept spinning...
What is light? This question might well be posed by an interested pupil. The approach taken in this topic starts on familiar...
Frequency describes the rate of repetition of a periodic event. Frequency is defined as the number of cycles (number of...
A model of colour perception, proposed in 1872 by Ewald Hering, argued colour vision involves two opponent pairs of colours...
Stories from Physics
Recognising and celebrating outstanding contributions to the field of physics education.