A) Concave, 25 cm
B) Convex, 50 cm
C) Concave, 20 cm
D) Convex, 100 cm
Correct Answer: B
Solution :
\[P={{P}_{1}}+{{P}_{2}}\Rightarrow P=+\,6-4=+\,2\,D.\] So focal length \[f=\frac{100}{2}\] = + 50 cm; convex lensYou need to login to perform this action.
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