A goldfish is at the center of a spherical fish bowl, diameter d, filled with wa

Question

A goldfish is at the center of a spherical fish bowl, diameter d, filled with
water (n=1.33).
a) Draw the path of the light rays that emanate from the fish and leave the fish bowl. Use solid lines to indicate the actual path of the light and dotted lines to show the apparent path of the light.
b) Calculate where the fish appears when viewed from the outside and find its magnification to an observer outside the bowl.
c) Calculate the focal point of the parallel rays of the sun that hits the bowl and indicate whether the focal point resides inside or outside the bowl.

--You can ignore a) if you don't want to draw

Explanation / Answer

b)=real depth/apparent depth

1.33=d/apparent depth

apparent depth=3d/4

c)focal point is at a distance d/4.

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