Question

You are looking, from directly above, at a goldfish at the bottom of a 54.0-cm fish tank filled with water. How far away does the fish look to you? The index of refraction of water is 1.34. A beam of light is incident, from air, on a flat surface of glass (n=1.50). The refracted ray inside the glass is found to make an angel of 26.7° with the direction of the incident ray. Calculate the angle of incident.

Answer 1

consider folbring diagram 1 An Or De ar -Da Dr Do = Apparent depth Dr = Real clepth. is incidence ange ra betection angle Refraction Shell's Law Refractive index Nair Sino, = hw sin of for Small angle fino a tuno The Fundi from gromitra standi tumora how tanor A Da 14 or Given Dr=54cm Da +34 54 Dg Fish look at Da = 40.3 cm from surface of water. (40.3cm n = I air, m = 1.50 for glass Ox= 26.7 (Refrately angle Shellshanto Theildent angle ois sin - to sin Sin (26.7) n, sino ;= h, Sindr Oi= 42.370 incickener angle Z distance