A mirror and a source of light are si...

A mirror and a source of light are situated at the origin `O` and at a point on `O X ,` 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 find the `D C s` of the reflected ray.

`1/3, 2/3,2/3`

`-1/3, 2/3,2/3`

`-1/3, -2/3, -2/3`

`-1/3,-2/3, 2/3`

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