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  4. A double convex lens, made of a material of refractive index μ1, is placed inside two liquids of refractive indices μ2 and μ3, as shown in the figure. μ2>μ1>μ3. A wide, parallel beam of light is incident on the lens from the left. The lens will give rise to <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/0ea07ce8242cccb8ca96d35594f16086-.png />

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Q. A double convex lens, made of a material of refractive index $\mu_{1}$, is placed inside two liquids of refractive indices $\mu_{2}$ and $\mu_{3}$, as shown in the figure. $\mu_{2}>\mu_{1}>\mu_{3}$. A wide, parallel beam of light is incident on the lens from the left. The lens will give rise to
image

Ray Optics and Optical Instruments

Solution:

As $\mu_{2}>\mu_{1}$, the upper half of the lens will become diverging. As $\mu_{1}>\mu_{3}$, the lower half of the lens will become converging.