A Concave Makeup Mirror Is Designed So That at Wallpaper

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A Concave Makeup Mirror Is Designed So That. A concave makeup mirror is designed so that a person 27 cm in front of it sees an upright image magnified by a factor of two. What is the radius of curvature of the mirror?

Yardley powder compact, c 1930s with concave mirror, c1940s silver
Yardley powder compact, c 1930s with concave mirror, c1940s silver from www.daynartvintage.com

A pen placed 11.0 cm from a concave spherical mirror. What is the radius of curvature of the mirror? A concave mirror is found to focus parallel rays at the distance on 9 cm.

Yardley powder compact, c 1930s with concave mirror, c1940s silver

This is the best answer based on feedback and ratings. A concave mirror is found to focus parallel rays at the distance on 9 cm. A concave makeup mirror is designed so that a person 25 cm in front of it sees an upright image magnified by a factor of two. A concave shaving mirror has a focal length of 33 cm.