The reflection of the point \[\vec{a}\] in the plane \[\vec{r}\].\[\vec{n}\] =q is

\[\vec{a}+\frac{2(\vec{q}-\vec{a}\,\cdot \vec{n})}{\left| {\vec{n}} \right|}\vec{n}\]

\[\vec{a}+\frac{(\vec{q}-\vec{a}\,\cdot \vec{n})}{\left| {\vec{n}} \right|}\]

\[\vec{a}+2\left( \frac{(\vec{q}-\vec{a}\,\cdot \vec{n})}{{{\left| {\vec{n}} \right|}^{2}}} \right)\vec{n}\]

The reflection of the point \[\vec{a}\] in the plane \[\vec{r}\].\[\ve

1.	The reflection of the point \[\vec{a}\] in the plane \[\vec{r}\].\[\vec{n}\] =q is
A.	\[\vec{a}+\frac{(\vec{q}-\vec{a}\,\cdot \vec{n})}{\left\| {\vec{n}} \right\|}\]
B.	\[\vec{a}+2\left( \frac{(\vec{q}-\vec{a}\,\cdot \vec{n})}{{{\left\| {\vec{n}} \right\|}^{2}}} \right)\vec{n}\]
C.	\[\vec{a}+\frac{2(\vec{q}-\vec{a}\,\cdot \vec{n})}{\left\| {\vec{n}} \right\|}\vec{n}\]
D.	none of these
Answer» C. \[\vec{a}+\frac{2(\vec{q}-\vec{a}\,\cdot \vec{n})}{\left\| {\vec{n}} \right\|}\vec{n}\]

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The reflection of the point \[\vec{a}\] in the plane \[\vec{r}\].\[\vec{n}\] =q is

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