Goldfish viewing cat through spherical fishbowl

[bcjochim07]

Homework Statement

A goldfish lives in a 50 cm diameter spherical fish bowl. The fish sees a cat watching it. If the cat's face is 20 cm from the edge of the bowl, how far from the edge does the fish seet it as being? (You can ignore the thin glass wall of the bowl).

Homework Equations

The Attempt at a Solution

(n1)/s + (n2)/s' = (n2-n1)/R

(1.0)/20cm + (1.33)/s' = (1.33-1.00)/(25cm)

s'= -36.14 cm The fish will see a virtual image of the cat's face inside the bowl 36.14 cm. Is this correct, or can only an observer from outside the bowl see this virtual image?

 

[bcjochim07]

no... actually nevermind... the fish sees the cat's face outside the bowl 36.14 cm