How to detect infrared?

Infrared (IR) light is electromagnetic radiation with wavelength longer than that of visible light. Its wavelength is measured from 0.74-300 micrometers based on the astronomy division scheme. The red visible light has a wavelength within 0.63-0.74 micrometers (630-740 nanometers). Our eye can detect or see visible light with wavelength ranging from 0.38 micrometers to 0.74…