Question

A ray of light is incident along a line which meets another line, 7x - y + 1 = 0, at the point (0,1). The ray is then reflected from this point along the line, y + 2x 1. Then the equation of the line of incidence of the ray of light is​

Answer 1

Answer:

Since, the incident ray of light meets the line $7x - y + 1 = 0$ at a point (0,1) which means this point will satisfy the equation of the incident ray of light. Hence, the equation of the incident ray of light is $ - 2x - y + 1 = 0$ which is not there in the options. Hence, option D is correct.

Answer 2

Answer:

Since, the incident ray of light meets the line $7x - y + 1 = 0$ at a point (0,1) which means this point will satisfy the equation of the incident ray of light. Hence, the equation of the incident ray of light is $ - 2x - y + 1 = 0$ which is not there in the options. Hence, option D is correct.