Seeing beyond the visible

This booklet is part of the ‘Innovations in Practical Work’ series published by the Gatsby Science Enhancement Programme (SEP). Silicon-based sensors detect photons that we ourselves cannot, and so provide a real extension to our senses. The booklet looks at these sensors and imaging software and how they can be used to obtain and manipulate infrared and visible images, and provides an accessible overview of the theory behind imaging. The activities can be used when introducing the electromagnetic spectrum, discussing colours, or talking about the role of measurement in providing an account of how science works.