A Object Is 12 Cm in Front of a Concave

question 20

Multiple Choice

A object is 12 cm in front of a concave spherical mirror,and the image is 3.0 cm in front of the mirror.What is the focal length of the mirror?

• A) 0.25 cm
• B) 15 cm
• C) 4.0 cm
• D) 2.4 cm
• E) 1.3 cm

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