Difference of orthogonal and orthonormal ?

Orthonormality

In linear algebra, two vectors in an inner product space are orthonormal if they are orthogonal and both of unit length. A set of vectors form an orthonormal set if all vectors in the set are mutually orthogonal and all of unit length. An orthonormal set which forms a basis is called an orthonormal basis.


Orthogonal mean that the dot product is null.
Orthonormal mean that the dot product is null and the norm is equal to 1.

If two or more vectors are orthonormal they are also orthogonal but the inverse is not true.
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