This is the 6980th most frequent Korean word.
적외선
"Infrared radiation."
Here, '적외선' is part of a device description, indicating the technological application of infrared light.
적외선 센서를 사용하여 물체를 감지합니다.
We use an infrared sensor to detect objects.
'적외선' is associated with a type of camera here, demonstrating its role in enhancing visibility in low-light conditions.
적외선 카메라로 밤에도 주변 환경을 관찰할 수 있습니다.
With an infrared camera, we can observe the surroundings even at night.
In this sentence, '적외선' refers to a specific type of electromagnetic radiation, making use of its scientific definition.