A light ray has incident vector and strikes a plane whose unit normal is

MATHEMATICS · Single correct · CBSE · Mathematics · Vector Algebra · Vector Algebra

Problem

A light ray has incident vector

\mathbf{v}=(2,-1,2)

and strikes a plane whose unit normal is

\hat n=(0,0,1)

. Calculate the angle between the incident and the reflected rays (to the nearest whole degree). (a)

90^{\circ}

(b)

84^{\circ}

(c)

48^{\circ}

(d)

96^{\circ}