If a ray travelling along the line `x = 1` gets reflected from the line x + y = 1, then the eqaution the line along which the reflected ray travels is

Options

A. y = 0
B. x - y = 1
C. x = 0
D. none of these

Explanation

Clearly , the incidence ray makes `45^(@)` angle with the normal at P . So , the reflected ray will also make the same angle with the normal . Consequently , it is along x-axis i.e. y = 0 .