Figure 1. Electromagnetic spectrum. The sensors of TICs are sensitive to the emission of IR-radiation between 3 and 14μm

From

Can You See the Heat? – Using a Thermal Imaging Camera in the Chemistry Classroom

Claudia Bohrmann-Linde, Simon Kleefeld

World Journal of Chemical Education. 2019, 7(2), 179-184 doi:10.12691/wjce-7-2-18