in the arrangement shown in figure, image of a light sorce o is obtained at the bottom of a beaker containing water of refractive index 4/3. the value of H is

Dear Student,
Please find below the solution to your problem.

As seen from out side shift observed due to water is t×(1-1/μ​)=10×(1−3/4​)=2.5
and for the mirror object distance is 5+10−2.5=12.5
Hence the image distance from mirror is 12.5,
Hence option B is correct .

Thanks and Regards