光線(こうせん)

こうせん
noun
beam, ray of light
1. beam, ray of light, light ray
A line or stream of light, especially one coming from a particular source.
紫外(しがい)光線(こうせん)は肌(はだ)に悪(わる)い。
Ultraviolet rays are bad for the skin.
太陽(たいよう)の光線(こうせん)が部屋(へや)に差(さ)し込(こ)んだ。
Rays of sunlight streamed into the room.
レーザー光線(こうせん)を使(つか)った手術(しゅじゅつ)が行(おこな)われた。
Surgery using laser beams was performed.

光線(こうせん) refers to rays or beams of light, often used in scientific or technical contexts.

Types

  • 太陽(たいよう)光線(こうせん): sunlight, solar rays
  • 紫外(しがい)光線(こうせん): ultraviolet rays (UV)
  • 赤外(せきがい)光線(こうせん): infrared rays
  • レーザー光線(こうせん): laser beam
  • X線(せん): X-rays

Common expressions

Related words

Related Words

Homophone: 交戦(こうせん) (battle, engagement in warfare)
Related: 日光(にっこう) (sunlight)
Related: 放射線(ほうしゃせん) (radiation)
general
Added 2026.1.13 23:00 · Revised 2026.9.29 5:24
04000/04144_kousen