The mirror formula is 1/u + 1/v = 1/f.For a plane mirror f = $\infty $.
Substituting, we have
1/u + 1/v + 1/$\infty $ ======> 1/u = - 1/v =====> -v.
The mirror formula is 1/u + 1/v = 1/f.For a plane mirror f = $\infty $.
Substituting, we have
1/u + 1/v + 1/$\infty $ ======> 1/u = - 1/v =====> -v.