Unit vector of reflection in terms of unit vector incidence and normal
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A ray of light on a plane mirror comes along a vector i+j−ki+j−k
The normal on incidence point is along i+ji+j
we need to find unit vector along the reflected ray.
I am not able to solve and draw the picture. could any one explain me what is going on?
answer given is −13√(i+j+k)
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