CAIE IGCSE Physics Comparing Infrared Emitters
Practise designing a fair comparison of infrared emitters using matched black and white surfaces, controlled hot water and cooling or detector readings.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- compare equal-area black and white surfaces using matched hot water or a Leslie cube
- control initial temperature, water volume, geometry, time and detector distance
- infer the better emitter from faster cooling or the larger equal-distance detector reading
2.3.3.7—Experiments to distinguish between question 1
Using the apparatus shown in Fig. 5.1, describe an experiment to demonstrate good and bad emitters of thermal radiation. Include the expected results and the conclusion.
You may use a diagram.
Fig. 5.1
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