透镜

透鏡

tòujìng

noun #35,170

Measure Word

一个透镜 gè

Meanings

1 lens (optics)
2 optical lens

Characters

penetrate / pass through

Examples

凸透镜可以聚光。

Tū tòujìng kěyǐ jùguāng.

A convex lens can focus light.

相机的透镜很贵。

Xiàngjī de tòujìng hěn guì.

The camera's lens is expensive.

Tips

memory

透 ('penetrate / pass through') + 镜 ('mirror / glass') = 'glass that light passes through' = lens. The two basic types are 凸透镜 (tū tòujìng, convex lens) and 凹透镜 (āo tòujìng, concave lens) — the characters 凸 and 凹 visually depict their shapes.

Stroke Order

透 tòu

镜 jìng