Robert is on a ship looking at a school of fish below the lake surface. He estimates the apparent depth of the school to be two meters, and that his observation angle is forty five degrees. Calculate the real depth of the school. Here is what I think we know: θr=45°, θi=?, ni=1.00, nr=1.33 Because the index of refraction goes from a lower value to a higher one the light will bend towards the normal which I drew in the diagram. So if we want to find θi would it be sinθi=((sin45°)(1.33))/(1.00)? I'm a bit lost and would really appreciate some help.