1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Fish in a Fish bowl?

  1. Apr 3, 2008 #1


    User Avatar

    Q. There is a fish in a spherical fish bowl of radius r filled with water. The fish is at a distance l from the surface of the tank. An observer in air views the fish at a distance d from the tank.

    Please see the attachment for the image.

    I am supposed to find the optical power and focus length of the water-air interface, the magnification power of the fish tank and an expression for the distance (L) between the obsever and optical image of the fish.

    Here are the attempts I have made:

    Optical power = (n1-n2)/(-r)

    Focus Length = f'=n2/P = -n2r/(n1-n2)
    I used f' because I think it is a virtual image?

    Magnification Power = -(Image Distance/Object Distance) =-((L-d)/-r)

    L=(-n1/r + n2/l)

    Can anyone tell me if these are correct or if I am at least going along in the right direction?

    Attached Files:

    Last edited: Apr 4, 2008
  2. jcsd
  3. Apr 26, 2010 #2
    Try the refraction at a single surface formula

    here, n1=1.33 (water); N2=1 (air)
    and note the sign of s should be negative as the fish is not on the incident-light side of the surface.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Fish in a Fish bowl?
  1. Parabolic Bowl (Replies: 2)

  2. Force on a Fishing Rod (Replies: 3)