The tangent and perpendicular of a mirror

[shihab-kol]

The tangent passes through just one point
Now i can draw it such that the angle of incidence is always 0 and incident angle is always 90
Then no image will be formed.
Why does this not happen??

 

[.Scott]

A tangent passes through just one point of a curved line or surface, but does not cross it at that point. It doesn't sound as though you are talking about any curved surfaces.