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Find the region on Y-axis in which refle...

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.

Text Solution

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The image of the point A in the mirror is at `A^(') (6,0)` .
Join `A^(')M` and extend to cut Y-axis at `M^(')` (ray originating from A which strikes the mirror at M gets reflected as the ray `MM^(')` which appears to come from `A^(')` ). Join `A^(')N` and extend to cut Y-axis at `N^(')` (ray originating from A which strikes the mirror at N gets reflected as the ray `N N^(')` which appears to come from `A^(')` ).
From Geometry:
`M^(')=(0,6)
and `N^(')=(0,9)
`M^(')N^9')` is the region on Y-axis in which reflected rays are present .
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