JEE Mains · Physics · STD 12 - 9. Ray optics and optical instruments
A bi convex lens of focal length \(10\,cm\) is cut in two identical parts along a plane perpendicular to the principal axis. The power of each lens after cut is \(...........\,D\).
- A \(4\)
- B \(5\)
- C \(3\)
- D \(2\)
Answer & Solution
Correct Answer
(B) \(5\)
Step-by-step Solution
Detailed explanation
Let power of each part is \(P_1\), then \(P _1+ P _1= P =\frac{1}{ f }\) \(2 P _1=\frac{1}{0.1}=10\) \(P _1=5\,D\)
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