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critical angle

 

Definitions from WordNet

Noun critical angle has 1 sense
  1. critical angle - the smallest angle of incidence for which light is totally reflected
    --1 is a kind of
    angle of incidence, incidence angle

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:

  1. Physics: The specific angle of incidence when light passes from one medium to another, beyond which total internal reflection occurs.
  2. 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:

  1. The critical angle of water when in contact with air is approximately 48.7 degrees.
  2. When light attempts to pass from water to air at an angle greater than the critical angle, it will experience total internal reflection.
  3. The concept of critical angle is crucial in understanding the phenomenon of fiber optics.

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