Question

How does calculate apparent position of object?

Answer 1

Picture shows the difference between the real depth and apparent depth of the object under water. We see the objects closer than their real depth to the surface. We see objects only if the rays coming from them reaches our eyes. In this picture, ray coming from the fish reaches the observer’s eye after refraction. Thus, observer sees the image of the fish at the distance Da from the surface which is the apparent depth of the fish. On the contrary fish sees the objects away from their real distances. These are all results of the refraction of light. Following diagram helps us to calculate this apparent depth of the object under different mediums.