Answers

2015-10-04T06:39:39+05:30
When a ray  of light falls normally on the surface of the mirror ,the gets reflected back .then the angle of incidence and angle of reflection will be equal and it will be zero degree.  
i hope this helps u...
1 4 1
It will revert back retracing it's path as the angle of incidence is 0 degree.
PLS MARK IT AS BRAILIEST
2015-10-04T08:18:07+05:30
It will revert back retracing it's path as the angle of incidence is 0 degree.
0