A) A concave lens (f = 18 cm)
B) A convex lens (f = 18 cm)
C) A convex lens (f = 6 cm)
D) A concave lens (f = 6 cm)
Correct Answer: A
Solution :
\[\frac{1}{F}=\frac{1}{+18}+\frac{1}{(-\,9)}\Rightarrow F=-\,18\]cm (i.e. concave lens)You need to login to perform this action.
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