# Physics 30

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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.

• Physics 30 -

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.

• Physics 30 -

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

• Physics 30 -

Thanks

• Physics 30 -

WHAT IS RESONANCE

• Physics 30 -

WHAT IS RESONANCE

• Physics 30 -

DEFIN RETARDATION

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