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# Physics: A concave mirror with radius of curvature of 20.0cm.

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A concave mirror has a radius of curvature of 20.0 cm. An object 2.0 cm high is placed 30.0 cm in front of the mirror. Find the position of the image and the height of the image.

https://brainmass.com/physics/mirrors/finding-position-image-494641

#### Solution Preview

Some formulas that might be useful:

1/F = 1/di + 1/do (F = focal length, di = distance of image, do = distance of object)

For magnification:
M = hi/ho (factor of magnification as expressed for height of image and object)
M = - di/do (factor magnification as expressed for distances of image and object)

r = 2F (r = radius of curvature, F = focal length)

Ok, so let's see what information we have:
r = 20.0cm
height of ...

#### Solution Summary

This solution provides steps to determine the position of an image in a mirror.

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