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A beaker containing liquid is placed on ...

A beaker containing liquid is placed on a table, underneath a microscope which can be moved along a vertical scale. The microscope is focused, through the liquid onto a mark on the table when the reading on the scale is `a`. It is next focused on the upper surface of the liquid and the reading is `b`. More liquid is added and the observations are repeated, the corresponding readings are `c` and `d`. The refractive index of the liquid is

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While determining the refractive index of a liquid experimentally, the microscope was focussed at the bottom of a beaker, when its reading was 3.965 cm. on pouring liquid upto a height 2.537 cm inside the beaker, the reading of the refocussed microscope was 3.348 cm. Find the refractive index of the liquid.

While determining th refractive index of a liquid experimentally, he miroscope was focussed at the bottom of a beaker,when its reading was 3.965 cm.On pouring liquid upto a height of 2.537 cm inside the beaker ,the reading of the refocussed microscoe was 3.348 cm.Find the refractive index of the liquid.