(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 1.80-cm-high object is situated 19.7 cm in front of a concave mirror that has a radius of curvature of 12.2 cm. Calculate (a) the location and (b) the height of the image.

2. Relevant equations

f=1/2R

1/image distance + 1/object distance = 1/f

3. The attempt at a solution

f=1/2(12.2) = 11.1

1/image distance + 1/19.7 = 1/6.1

image distance = 8.836 cm

then I thought to find the image height I'd just take 8.836 cm - 1.8 cm = 7.036 cm but this is incorrect.

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# How do I find the height of the image?

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