A microscope is focused on an object at the bottom of a bucket. If liquid with refractive index 5/3 is poured inside the bucket, then the microscope has to be raised by 30 ~cm to focus the object again. The height of the liquid in the bucket is:

Optics: JEE Main 2023 Physics question

JEE Main 2023 · 31 Jan, Evening shift · Q7118

JEE Main 202331 Jan, Evening shiftPhysicsEasyOptics190× since 2002

A microscope is focused on an object at the bottom of a bucket. If liquid with refractive index

\frac{5}{3}

is poured inside the bucket, then the microscope has to be raised by

30 \mathrm{~cm}

to focus the object again. The height of the liquid in the bucket is :

JEE Main 2023 · 31 Jan, Evening shift · Q7118

JEE Main 202331 Jan, Evening shiftPhysicsEasyOptics190× since 2002

A microscope is focused on an object at the bottom of a bucket. If liquid with refractive index

\frac{5}{3}

is poured inside the bucket, then the microscope has to be raised by

30 \mathrm{~cm}

to focus the object again. The height of the liquid in the bucket is :