NEET · Physics · STD 12 - 9. Ray optics and optical instruments
A biconvex lens has radii of curvature, \(20\,cm\) each. If the refractive index of the material of the lens is \(1.5\), the power of the lens is .... \(D\)
- A \(+20\)
- B \(+5\)
- C infinity
- D \(+2\)
Answer & Solution
Correct Answer
(B) \(+5\)
Step-by-step Solution
Detailed explanation
\(R _{1}= R _{2}=20 cm =0.2 m\) \(\mu=\frac{3}{2}\)
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