Determine equation for object distance

[Barry Melby]

Homework Statement

You wish to use a converging mirror to form an image that is N times larger than the object. R is the radius of curvature of the mirror. At what distance o from the mirror should you place the object? Determine the object distance. Express your answer in terms of N and R. Follow the sign convention.

Homework Equations

1/f = 1/o + 1/i
N = -i/o
f = R/2

The Attempt at a Solution

N*o = 1 / (2/R + 1/o)
2N*o + N =1
o = ((1-N)/R)(1/2N)
This appears incorrect though.

 

[Geofleur]

It is, in fact, incorrect. But what are your reasons for thinking so?