Ansel places an object 34.8 cm from a thin convex lens along the axis.If a real image forms at a distance of 13.2 cm from the lens,what is the focal length of the lens?
A) 34.8 cm
B) 21.3 cm
C) 13.2 cm
D) 9.57 cm
E) 21.6 cm
Correct Answer:
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