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.

Practical Activity 14-16

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...

Physics Narrative 11-14

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...

Stories from Physics 11-14 14-16