Question

Water has an index of refraction of n= 4/3. A diving mask has a flat lens. Calculate the magnification and image location of a fish at arms length (S0= 2/3 m formed by the mask.)

a)		Si=−2/3 m and M= 1
b)		Si=−1/2 m and M= 1
c)		Si=−1/2 m and M= 3/4
d)		Si=−8/9 m and M= 1

Now we want to design a diving mask that produces an image of the fish at the location where the fish is, that is the object and image distance of the fish are at the same location. The fish is 2/3m from the mask and the index of refraction of the water is still n= 4/3. Compute the radius of curvature of the glass in the mask needed to accomplish this. Select whether the mask bends in toward the diver or out toward the water.

a)		3 m outward
b)		3m inward
c)		2/3 m outward
d)		2/3 m inward
e)		None of the above

Answer 1