光線

(1)a column of light (as from a beacon)

(2)光の列（ビーコンから発せられるような）

(3)(physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window"

(4)視覚の感覚を生じさせる電磁放射

(5)(mathematics) a straight line extending from a point

(6)一点からのびる直線