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IEVref:731-03-01ID:
Language:enStatus: Standard
Term: light ray
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Definition: the path which is tangential at each point to the direction of propagation of the radiant energy at this point

NOTE 1 – The concept of a ray is the basis of geometric optics.

NOTE 2 – Several rays may exist between two points.

NOTE 3 – In an isotropic medium the ray is normal to the wavefront.


Publication date:1991-10
Source:MOD 705-02-19
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