P2.2 Radiation

For the Do Now task students distinguish the hotter parts of the objects from the colder ones using infrared images (thermograms). This is then followed by a discussion on the nature of infrared radiation where links are made to the electromagnetic spectrum, and showing how IR is detected. Students then explore the nature of ‘black body radiation’ by observing changes in the radiation given out by a filament lamp as it heats up. This concept is further explored by studying changes in the black-body emission graphs. Exam questions for this lesson are also included and mark schemes for all tasks are provided in the powerpoint lesson.