光線
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Base noun form. Refers to a beam or ray of light, such as from the sun, a lamp, or a laser. Used in scientific and general descriptions of light phenomena.
Theme
Two friends, Ken and User, are stargazing at a park and discussing astronomy and light phenomena.
光線
こうせん
beam, light ray
Nature & EnvironmentNatural Phenomena
Memory Hook
Think of a 'light ray' shining through a 'kōsen' (光線 kōsen sounds like 'co-sen') — it's a beam of light! 'Co-sen' → 光線 (kōsen, 'beam, light ray').
Cultural Note
『光線』 (kōsen, 'beam, light ray') is commonly used in science, photography, and everyday language to describe rays of light, such as sunlight or laser beams. It appears in contexts like 『太陽光線』 (taiyō kōsen, 'sunlight rays') or in media about optics.
Forms
Base: 光線Base noun form. Refers to a beam or ray of light, such as from the sun, a lamp, or a laser. Used in scientific and general descriptions of light phenomena.