critical angle


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critical angle

n.
1. The smallest angle of incidence at which a light ray passing from one medium to another less refractive medium can be totally reflected from the boundary between the two.
2. The angle of attack of an airfoil at which airflow abruptly changes, causing changes in the lift and drag of an aircraft.

critical angle

n
1. (General Physics) the smallest possible angle of incidence for which light rays are totally reflected at an interface between substances of different refractive index
2. (Aeronautics) another name for stalling angle

crit′ical an′gle


n.
1. the minimum angle of incidence beyond which total internal reflection occurs for light traveling from a medium of higher to one of lower index of refraction.
2. the angle of attack at which a sudden change in airflow occurs around the wings of an aircraft, reducing lift and increasing drag.
[1870–75]

crit·i·cal angle

(krĭt′ĭ-kəl)
The smallest angle of incidence at which a light ray can be completely reflected from the boundary between two media.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.critical angle - the smallest angle of incidence for which light is totally reflected
angle of incidence, incidence angle - the angle that a line makes with a line perpendicular to the surface at the point of incidence
References in periodicals archive ?
smaller than the critical angle for P3HT, total reflection occurs and only a short-lived beam transverses just few nanometers below the surface, giving diffraction mainly from the surface of the composite film.
The angle of incidence that yields an angle of refraction of 90[degrees] is the critical angle.
There is also an audible "Geiger counter" clicking heard through the headset that increases in speed the closer the SCx shows to the critical angle of attack.
Mr Oh, a helmsmen on the ferry with 10 years' shipping experience, said that when the crew gathered on the bridge and sent a distress call the ship was already listing more than five degrees, the critical angle at which the ship can be brought back to even keel.
Oh Yong-seok, a helmsman on the ferry with 10 years of shipping experience, said that when the crew gathered on the bridge and sent a distress call, the ship was already listing more than 5 degrees, the critical angle at which a vessel can be brought back to even keel.
This is because the pile's grains are already close to the critical angle where they will start rolling down the pile.
scan using a fixed incidence angle just below the critical angle (GIXRD) measurements reflectometric (XRR) and X-ray scattering niskokatowego (SAXS) for single crystals and thin epitaxial layers ultacienkich and complex heterostructures and superlattices.
Operating parameters such as gas flow rate, pressure, temperature and pipe ID are used to calculate the critical angle requirements for DG-ICDA.
cr] is a critical angle of attack that is characterised by sharp changes in the pressure profile on the blade back, [i.
At a certain crack width, w, only those fibres which are inclined less than the critical angle [[theta].
CANCER (June 22-July 23) You seem to be looking at yourself from an overly critical angle and it would be worth your while accepting and taking in some of the constructive comments that your close ones are giving you.

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