When an object is 12 cm in front of a concave mirror,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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The Answer of When an object is 12 cm in front of a concave mirror,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

When an Object Is 12 Cm in Front of a Concave