Can you detect radiation emitted from a TV remote with your infrared camera?

• A. Yes
• B. It varies by battery
• C. Only if the camera is specialized
• D. No

Answer: (D)

Infrared cameras used for thermography detect heat energy in the long-wave infrared range (roughly 8–14 micrometers). The TV remote emits near-infrared light around 940 nanometers, which is not heat and sits outside the spectral band a thermal camera reads. The thermal camera looks for emitted heat, not reflected light, so it won’t pick up the remote’s signal. If you used a camera sensitive to near‑IR (like some standard digital cameras with the IR filter removed), you could see the remote’s LED blink, but that’s a different type of infrared sensor.