Curved surfaces of a plano


Curved surfaces of a plano-convex lens of refractive index $\mu_{1}$ and a plano-concave lens of refractive index $\mu_{2}$ have equal radius of curvature as shown in figure. Find the ratio of radius of curvature to the focal length of the combined lenses.

  1. $\frac{1}{\mu_{2}-\mu_{1}}$

  2. $\mu_{1}-\mu_{2}$

  3. $\frac{1}{\mu_{1}-\mu_{2}}$

  4. $\mu_{2}-\mu_{1}$

Correct Option: , 2







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