1.

A mirror and a source of light are situated at the origin 0 and at a point on OX respectively. A ray of light from the source strikes the mirror and is reflected. If the direction ratios of the normal to the plane are 1, -1, 1, then direction consines of the reflected rays are

A. \[\frac{1}{3},\frac{2}{3},\frac{2}{3}\]
B. \[-\frac{1}{3},\frac{2}{3},\frac{2}{3}\]
C. \[-\frac{1}{3},\frac{2}{3},-\frac{2}{3}\]
D. \[-\frac{1}{3},-\frac{2}{3},\frac{2}{3}\]
Answer» E.


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