question_answer

Two vertical plane mirrors are inclined at an angle of \[60{}^\circ \] with each other. A ray of light travelling horizontally is reflected first from one mirror and then from the other. The resultant deviation is

A)            \[60{}^\circ \]                      

B)            \[120{}^\circ \]

C)            \[180{}^\circ \]                    

D)            \[240{}^\circ \]