Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Size of projected image on retina

  1. Dec 20, 2011 #1
    1. The problem statement, all variables and given/known data
    The eye sits a distance L above a horizontal plane filled with square tiles with sides of length B. Neglect the curvature of the retina. Find formulae for:

    1) The width b of the projected image on the retina for a tile at distance D
    2) The height c of the projected image on the retina for a tile at distance D
    3) The area a of the projected image on the retina for a tile at distance D

    http://img155.imageshack.us/img155/1661/46682727.jpg [Broken]

    Uploaded with ImageShack.us

    3. The attempt at a solution

    1 & 2) [tex]\frac{BS}{\sqrt{D^2 + L^2}} = b = c[/tex]

    I get the same thing for both. Is this correct?

    3) I would say a = bc, but there might be more to it?
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted