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When a Person Stands 40 Cm in Front of a Cosmetic

Question 147

Multiple Choice

When a person stands 40 cm in front of a cosmetic (concave) spherical mirror, the upright image is twice the size of the object. What is the focal length of the mirror?


A) 80 cm
B) 40 cm
C) 27 cm
D) 160 cm

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