angle of incidence
angle of incidence — 名詞
1. the angle between a ray of light hitting a surface and an imaginary straight lin
入射角
光線射向表面時與法線所夾的角
the angle between a ray of light hitting a surface and an imaginary straight line that stands upright from that surface where the ray lands
Felipe measured the angle of incidence as the laser beam struck the flat mirror.
Felipe 在雷射光束打到平面鏡上時，測量了入射角。
the angle of incidence of [light hitting a surface]
When the angle of incidence grows larger, more sunlight bounces off the calm lake.
當入射角變大時，會有更多陽光從平靜的湖面反射出去。
larger angle of incidence → more reflection
The teacher drew the upright line so students could see the angle of incidence.
老師畫出那條垂直的線，好讓學生看到入射角。
measured from the line upright to the surface
Mei tilted the glass slowly and watched the angle of incidence change on the screen.
Mei 慢慢傾斜玻璃，看著螢幕上的入射角跟著改變。
For a perfect mirror, the angle of incidence always equals the angle of reflection.
對一面完美的鏡子來說，入射角永遠等於反射角。
equals the angle of reflection
- measure the angle of incidence
- increase the angle of incidence
- equals the angle of reflection
- incident angle
more technical wording, common in engineering and optics papers
- angle of reflection
the matching angle of the ray that bounces back off the surface
文法句型
the angle of incidence of [light/a ray]
用法筆記
Measured from the surface normal (the line standing upright to the surface), not from the surface itself. Almost always paired with 'angle of reflection' or 'angle of refraction' in optics.