Question

A hungry fish in a tank of water notices a small fly that is located directly above the fish's eye as shown at right. Draw a clear, qualitatively correct ray diagram that shows the apparent location of the fly as seen by the fish (i.e., the image location of the fly). 42 Small fly Air Water Fish's eye

Answer 1

Answer: So, the only trick here is that we have to be careful about the rarer and denser medium and consider that there is an angular spread through which an eye can see and realise that an image is formed where two or more rays meet.

When we apply this to our question and create a ray diagram using two rays (one normal and one ordinary) and refraction laws, we realise that the image will be raised than the actual location of the fly.

So, the only trick here is that we have to be careful about the rarer and denser medium and consider that there is an angular spread through which an eye can see and realise that an image is formed where two or more rays meet. When we apply this to our question and create a ray diagram using two rays (one normal and one ordinary) and refraction laws, we realise that the image will be raised than the actual location of the fly.