Question

A concave makeup mirror is designed so that
a person 25.3 cm in front of it sees an upright
image at a distance of 54.0 cm behind the
mirror.
a) What is the radius of curvature of the
mirror?
Answer in units of cm

Answer 1

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Answer 2

do=25.3cm
di=54.0cm
find f using following equation:

1/do + 1/di = 1/f

f=r/2

so the radius is 2 times the focal length