Translation guide
Infrared radiation is a type of electromagnetic radiation with wavelengths longer than visible light. In Japanese, it is most commonly referred to as 赤外線 (sekigaisen), which literally means 'red outside rays'. This term is used in both technical and everyday contexts.
infrared radiation
The physical phenomenon of infrared radiation, used in science, technology, and everyday contexts.
The standard term for infrared radiation. Used in all contexts from physics to consumer electronics.
Infrared radiation is invisible to the eye.
This camera detects infrared radiation.
A more technical term emphasizing the emission aspect. Common in physics and engineering.
The wavelength of infrared radiation is longer than that of visible light.
Infrared as a type of light or rays, often in consumer products like heaters or remote controls.
In compound words, 赤外 (sekigai) is often used as a prefix meaning 'infrared', e.g., 赤外線カメラ (infrared camera), 赤外線通信 (infrared communication).
In winter, infrared heaters are warm.