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When an object is placed 27 cm in front of a spherical mirror the magnification is...

When an object is placed 27 cm in front of a spherical mirror the magnification is -0.75. What are (a) image distance (including sign), (b) the focal length (including sign, and (c) the radius of curvature of the mirror (including sign)?

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Answer #1

Mirror formula: ( Real positive sign convention)

Object distance

a)

Magnification of mirror is   

Image distance is

b)

           

Focal length of mirror is

c)

Radius of curvature of the mirror is

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