Ray Optics and Optical Instruments Part 2

Two immiscible liquids of refractive indices ‌

8

5

and ‌

3

2

respectively are put in a beaker as shown in the figure. The height of each column is 6‌cm. A coin is placed at the bottom of the beaker. For near normal vision, the apparent depth of the coin is ‌

α

4

‌cm. The value of α is_______