Question

An object located in front of a concave mirror with a radius of curvature of 80 cm produces an invert image that is three times the size of the object. Calculate the distance between the object and the mirror.
I got stuck after i attempted to use 1/f=1/di+1/do, seeing as how i need di, which i don't have.
The inverted image is real, and di/do = 3 because of the stated magnification.
The focal length is f = R/2 = 40 cm

1/do + 1/(3do) = 1/40
4/(3 do) = 1/40
160 = 3 do

Solve for do
Thanks
WHAT IS RESONANCE
WHAT IS RESONANCE

Related Questions

A concave mirror has a radius of curvature of 0.975 m. An object is placed 2.08 m in front of the mi... A concave spherical mirror has a radius of curvature 15 cm. A 1 cm tall bulb is placed in front of t... A convex spherical mirror has a radius of curvature of 50 cm. Determine the position and magni catio... An object in front of a concave mirror has a virtual image that is 16.5 cm from the mirror. The mirr...