Categories > Ray Optics and Optical Instruments > Refraction at Curved Surface > A thin lens made of glass of refractive index $\mu = 1.5$ has a focal length equal to 12 cm in air. It is now immersed in water $\left( \mu \,=\,\frac{4}{3} \right)$. Its new focal length is

Ray Optics and Optical Instruments

Question: A thin lens made of glass of refractive index $\mu = 1.5$ has a focal length equal to 12 cm in air. It is now immersed in water $\left( \mu \,=\,\frac{4}{3} \right)$. Its new focal length is


1) 48 cm
2) 36 cm
3) 24 cm
4) 12 cm
Solution: Explanation: No Explanation
Refraction at Curved Surface

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