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 yòng lái 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