Posted by ###Nadine#### on Saturday, April 14, 2012 at 3:41pm.
The image distance must be -23.5 x 1.27 cm.
The minus sign means the image is behind the mirror. The image is virtual.
Image distance = di
Object distance = do
1/do + 1/di = 2/R
Now solve for R.
R, the radius of curvature, is a positive number. It is a concave mirror.
The mirror is concave (convex mirrors can only produce diminished images )
Image distance
1.27•23.5 =29.85 cm.
1/f = 1/di -1/do
1/f = 1/ 23.5 – 1/ 29.85 = 0.0091 cm
f = 109.9 =110cm = 1.1 m
R =2•1.1 = 2.2 m
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