Waves

Waves are a fundamental concept in physics that describe how energy is transferred from one place to another without the net movement of matter. In the AQA GCSE Combined Science specification, you will explore two main types of waves: transverse and longitudinal. Transverse waves, such as light and water waves, have oscillations perpendicular to the direction of energy transfer, while longitudinal waves, like sound, have oscillations parallel to the direction of energy transfer. Understanding waves is crucial because they underpin many technologies we use daily, from mobile phones and Wi-Fi to medical imaging like ultrasound and MRI scans.

This topic covers key properties of waves, including amplitude, wavelength, frequency, and wave speed. You will learn the wave equation (wave speed = frequency × wavelength) and how to apply it in calculations. The electromagnetic spectrum is also a major part of this topic, where you'll study the different types of electromagnetic waves, their uses, and dangers. Additionally, you'll explore reflection, refraction, and the behaviour of waves at boundaries, which are essential for understanding how lenses, mirrors, and optical fibres work.

Waves are not just a standalone topic; they connect to many other areas of physics and science. For example, the study of sound waves links to hearing and music, while light waves are central to vision and colour. In the wider curriculum, waves are also important in chemistry (e.g., spectroscopy) and biology (e.g., photosynthesis and the eye). Mastering waves will give you a solid foundation for more advanced topics in physics and engineering.