Class practical: The demonstration models the process of sampling an analogue signal at regular intervals in order to encode...
Practical Activity 14-16
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...
Classroom Activity 5-11 11-14
To find the frequency you simply count the number of vibrations each second. An alternative way to do the counting is to find...
Physics Narrative 11-14
The frequency of a visible photon is measured in terahertz ( 400–700 terahertz ). The energy of such photons is measured in...
Physics Narrative 14-16
This episode discusses: linear and angular velocity; degrees and radians; and angular acceleration. And is accompanied by...
Lesson 16-19
The two identical bottles vibrate at the same natural frequency. So when one vibrates and produces a note, this makes the...
Enrichment Activity 5-11 11-14
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...
Teaching Guidance 14-16
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...
Glossary Definition 16-19
What is possibly the world’s longest running science experiment was set up at the University of Queensland, Australia in 1927...
Stories from Physics 11-14 14-16
A model of colour perception, proposed in 1872 by Ewald Hering, argued colour vision involves two opponent pairs of colours...
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