A fish is viewed through the glass wall of a fish tank. The index of refraction of the glass is 1.5 and that of the water in the tank is 1.33. The fish lies a distance of 6 cm behind the glass. Light rays coming from the fish are bent as they pass from the water to the glass and then again as they pass from the glass to air (n = 1). The glass is 0.4 cm thick.
a. Considering just the first interface between the water and the glass, how far behind the glass does the image of the fish lie? (This is an intermediate image formed by bending of light at just the first surface.)
b. Using this image as the object for the second interface between the glass and air, how far behind the front surface of the glass does this “object” lie?
c. Considering the bending of light at this second interface between the glass and air, how far behind the front surface of the glass does the fish appear to lie?