A) 15 cm
B) -15 cm
C) - 30 cm
D) 30 cm
Correct Answer: C
Solution :
The focal length (f) of the combination of concave and convex lens is \[\frac{1}{f}=\frac{1}{{{f}_{1}}}+\frac{1}{{{f}_{2}}}\]You need to login to perform this action.
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