Online Google Dictionary

refract 中文解釋 wordnet sense Collocation Usage Collins Definition
Verb
/riˈfrakt/,
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refracted, past participle; refracts, 3rd person singular present; refracting, present participle; refracted, past tense;
  1. (of water, air, or glass) Make (a ray of light) change direction when it enters at an angle
    • - the rays of light are refracted by the material of the lens
  2. Measure the focusing characteristics of (an eye) or of the eyes of (someone)

  1. subject to refraction; "refract a light beam"
  2. determine the refracting power of (a lens)
  3. (refraction) the change in direction of a propagating wave (light or sound) when passing from one medium to another
  4. (refraction) deflection: the amount by which a propagating wave is bent
  5. (Refraction (metallurgy)) In metallurgy, refraction is a property of metals that indicates their ability to withstand heat. Metals with a high degree of refraction are referred to as refractory. These metals derive their high melting points from their strong intermolecular forces. ...
  6. To change direction as a result of entering a different medium; (Optics) To cause (light) to change direction as a result of entering a different medium
  7. (refracting) (ri-FRAKT-ing): bending or changing direction
  8. (Refraction) Refractive error: Hyperopia/Myopia · Astigmatism · Anisometropia/Aniseikonia · Presbyopia
  9. (Refraction) test for the eyes' ability to focus light rays properly on the retina at distances and close by.
  10. (Refraction) The degree of nearsightedness, farsightedness, or astigmatism is determined during this test. A series of lenses are used and adjusted before your eyes to determine the best correction.
  11. (Refraction) The bending of sound waves traveling through layered media with different sound velocities.
  12. (Refraction) The changing of direction of a lightwave in passing through a boundary between two dissimilar media, or in a graded-index medium where refractive index is a continuous function of position.
  13. (Refraction) The deflection of a light ray from a straight path when it passes at an oblique angle from one medium (such as air) to another (such as glass).
  14. (REFRACTION) The process by which the direction of a WAVE moving in SHALLOW WATER at an angle to the bottom contours is changed. ...
  15. (Refraction) The bending of light as it passes through different materials
  16. (Refraction) The deflection of a ray of light when passing obliquely out of a substance.
  17. (refraction) The test performed during an eye exam to determine the eyeglass lens powers needed for optimum visual acuity. An automated refraction uses an instrument that does not require the patient to respond. ...
  18. (Refraction) the tendency for waves to become more parallel to the coastline as they approach it. Caused by the slowing of waves at their base as they enter shallower water.
  19. (Refraction) The bending of light rays. The deflection from a straight path suffered by a ray of light as it passes obliquely from a medium of one optical density to a medium of a different optical density, as from air into water or from air into a gemstone. ...
  20. (Refraction) The bending of light as it enters a medium and slows down.
  21. (Refraction) The bending of light rays as they pass through a diamond or gemstone.
  22. (Refraction) Test to determine an eye's refractive error and the best corrective lenses to be prescribed. Series of lenses in graded powers are presented to determine which provide sharpest, clearest vision.
  23. (REFRACTION) The bending of a sound wave from its original path, either because it is passing from one medium to another or by changes in the physical properties of the medium, e.g. a temperature or wind gradient in the air.
  24. (Refraction) deviation of light rays at the interface of two transparent media with different refraction indexes according Snell-Descarte law
  25. (refraction) The degree to which light waves are bent, usually by curvature of the surface of the medium (e.g., a lens) through which the light waves are passing