Last Updated
：2026/01/05
入射角
Hiragana
にゅうしゃかく
Noun
Japanese Meaning
光線や波などが、境界面や物体の表面に当たるとき、その入ってくる線（入射線）と、その点における面の法線（垂直な直線）とのなす角度。光学・物理学で用いられる。 / 比喩的に、ある出来事や情報が人や社会に「入ってくる」際の向き・あり方をたとえる表現として用いられることもある。
Easy Japanese Meaning
ひかりなどが もののひょうめんに あたるとき そのめんに たてた せんとの あいだの かくど
Chinese (Simplified) Meaning
光线或波在入射点与表面法线之间的夹角 / 入射线相对于介质表面法线的角度
Chinese (Traditional) Meaning
光線或波入射至介面時與法線的夾角 / 入射線與表面法線之間的角度
Korean Meaning
표면의 법선과 입사선이 이루는 각 / 빛·파동이 매질 경계면에 들어갈 때 법선과 이루는 각도
Vietnamese Meaning
góc tới / góc giữa tia tới và pháp tuyến của bề mặt
Tagalog Meaning
anggulo ng pagpasok (sa optika) / anggulo sa pagitan ng sinag na papasok at patayo sa ibabaw / anggulo ng pagtama ng sinag sa ibabaw
Sense（1）
(optics) angle of incidence (angle that straight line makes with the normal of a surface)
（ canonical ）
（ romanization ）
（ romanization ）
（ hiragana historical ）
（ hiragana ）
Quizzes for review
(optics) angle of incidence (angle that straight line makes with the normal of a surface)
See correct answer
入射角
See correct answer
If the angle of incidence is large, the reflection becomes stronger.
If the angle of incidence is large, the reflection becomes stronger.
See correct answer
入射角が大きいと反射が強くなります。
Japanese - English
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