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!

Intereference of light (at least i think it is) and the human eyeball

  1. Sep 9, 2008 #1
    1. The problem statement, all variables and given/known data
    A human eyeball has roughly a diameter of 15mm. The diameter of the pupil can be up to roughly 5mm. Do you think that the fact that the light receptors on the retina are spaced by at least 2 micrometers is just a coincidence? Justify your answer.

    3. The attempt at a solution
    I don't know exactly what the question wants.
    I considered the pupil to be a slit, used d sin theta = n lambda for lambda = 400nm (wavelength of violet), and then found that the distance between maxima for violet is 1.2 micrometers. For lambda = 700nm (red light), the distance between maxima is 2.1 micrometres.
    I expected both values to be either greater than or less than 2 micrometers. (Then I could make up some crappy explaination about having the distances between maxima for all the colours to be greater/less than 2 micrometers :redface:)
    But obviously that didn't work for me so I guess that's not the right way to do it. Any ideas how to do this?
     
  2. jcsd
  3. Sep 10, 2008 #2

    alphysicist

    User Avatar
    Homework Helper

    Hi kehler,

    I believe this problem is referring to the resolving power of a circular aperture. Your textbook probably has a section or part of a section talking about it.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Intereference of light (at least i think it is) and the human eyeball
Loading...