how to decide a normal to a given medium?

Asked by  | 18th Nov, 2010, 12:00: AM

Expert Answer:

Dear student
A surface normal or normal to a given medium, or simply normal, to a flat surface representing the boundary of mediumis a vector that is perpendicular to that surface. A normal to a non-flat surface at a point P on the surface is a vector perpendicular to the tangent plane to that surface at P.
We hope this clarifies your doubt.

Answered by  | 19th Nov, 2010, 10:23: AM

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