Definitions from the Web
Critical Angle
Definition: The critical angle refers to the angle of incidence where light passing through a medium hits the boundary of another medium and is refracted parallel to the boundary, rather than being refracted away from the boundary.
Senses:
- Physics: The specific angle of incidence when light passes from one medium to another, beyond which total internal reflection occurs.
- Optics: The minimum angle at which a beam of light inside a medium, such as glass, is no longer refracted out but is instead completely reflected within the medium.
Sample Sentences:
- The critical angle of water when in contact with air is approximately 48.7 degrees.
- When light attempts to pass from water to air at an angle greater than the critical angle, it will experience total internal reflection.
- The concept of critical angle is crucial in understanding the phenomenon of fiber optics.
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