Find the region on Y-axis in which reflected rays are present. Object ia at `A(2,0)` and MN is a plane mirror, as shown in Figure.

Explanation

The image of point `A`, in the mirror is at `A'(6,0)` join t `A'M` and extend to out `Y` axis `M` (Ray origaning form `A` which strikes the mirror at `M` gets reflect as the ray `MM'` which appears to come form `A'`) Join `A'N` and externed to cut `Y` axis at `N'` (Ray originating form `A` which strikes the mirror `N` gets reflected as the rays `N N'` which apperars to come form `A'`)
From geometry.
`M' = (0,6)`
`N' = (0,9). M' N'` is the region on `Y` axis in which reflected rays are persent.