incidence angle
Definition
- Noun:
- The angle that a line makes with a line perpendicular to the surface at the point of incidence: This is the specific angle formed between an incoming ray (such as a light ray, sound wave, or particle) and an imaginary line drawn at a 90-degree angle (perpendicular) to the surface it strikes.
Usage
The term "incidence angle" is used in physics, engineering, and optics to describe the initial orientation of a wave or particle relative to a surface it encounters. It is a critical parameter for predicting the behavior of reflection and refraction.
Examples
- Noun:
- The incidence angle of the laser beam determines how much light is reflected from the mirror.
- To minimize glare, the solar panels are adjusted based on the sun's incidence angle.
- According to the law of reflection, the incidence angle is equal to the angle of reflection.
Advanced Usage
- "Angle of incidence": This is a perfectly equivalent and very common alternative phrasing for "incidence angle." The meaning is identical.
- The angle of incidence must be measured precisely for the experiment to work.
Variants and Related Words
- Angle of incidence (n): A direct synonym for "incidence angle."
- Angle of reflection (n): The angle between a reflected ray and the line perpendicular to the surface.
- Angle of refraction (n): The angle between a refracted ray (one that bends entering a new medium) and the line perpendicular to the surface.
- Normal (n): In this context, the imaginary line perpendicular to the surface at the point of incidence. The incidence angle is measured from the ray to this normal line.
Synonyms
- Angle of incidence: The primary and most precise synonym.
Related Concepts
- Law of Reflection: A principle stating that the incidence angle is equal to the reflection angle.
- Snell's Law: A formula that relates the incidence angle to the refraction angle when a wave passes from one medium into another.
Noun
-
the angle that a line makes with a line perpendicular to the surface at the point of incidence
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