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A definition for the normal in reflection and refraction?

  1. Oct 19, 2011 #1
    A definition for the normal in reflection and refraction?
     
  2. jcsd
  3. Oct 19, 2011 #2

    Doc Al

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    Staff: Mentor

    "Normal" just means perpendicular. When talking about angles of refraction or reflection, they are measured from a line normal to the surface.

    Or do you mean something else?
     
  4. Oct 19, 2011 #3
    It is the perpendicular at the point of incidence.
     
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