A) Concave lens, 100 cm
B) Concave lens, 40 cm
C) Convex lens, 40 cm
D) Convex lens, 50 cm
Correct Answer: C
Solution :
The power of the given lens has positive sign, so it is convex lens. So, \[+2.5=\frac{1}{f},f=\frac{1}{2.5}m=\frac{1}{2.5}\times 100\,cm\]You need to login to perform this action.
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