红外线

紅外線

hóngwàixiàn

noun #13,760

Meanings

1 infrared ray
2 infrared

Characters

outside; beyond

Examples

这个遥控器使用红外线信号。

Zhège yáokòngqì shǐyòng hóngwàixiàn xìnhào.

This remote control uses infrared signals.

红外线可以用来检测体温。

Hóngwàixiàn kěyǐ yònglái jiǎncè tǐwēn.

Infrared can be used to detect body temperature.

Tips

memory

红 (red) + 外 (outside) + 线 (line/ray) — infrared is the light 'outside' the red end of the visible spectrum.

Stroke Order

红 hóng

外 wài

线 xiàn