28 There is a small air bubble inside a glass sphere u 1 5

Last updated: 6/13/2023

28 There is a small air bubble inside a glass sphere u 1 5 of radius 10 cm The bubble is 4 0 cm below the surface and is viewed normally from outside Find the apparent depth of the bubble 1 3 1 cm from the surface 2 2 cm from the surface 3 4 cm from the surface