Ask Question
24 June, 12:35

Light of intensity 2.00 W/m2 passes through the pupil of one of your eyes and eventually falls on your retina. The radius of the pupil is controlled by the iris. In a human eye, the radius of the pupil can vary from about 1.0 mm to about 3.5 mm. The area of the opening can be calculated from pi (3.1416) times the radius squared. If your pupil is open to a radius of 2.5 mm, how much light energy passes through in one minute

+1
Answers (1)
  1. 24 June, 12:50
    0
    Intensity of light, I = 2 W/m²

    radius of pupil open, r = 2.5 mm = 2.5 x 10^-3 m

    time, t = 1 min = 60 second

    Energy passes, E = intensity x area x time

    E = 2 x 3.14 x 2.5 x 2.5 x 10^-6 x 60

    E = 2.36 x 10^-3 Joule
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Light of intensity 2.00 W/m2 passes through the pupil of one of your eyes and eventually falls on your retina. The radius of the pupil is ...” in 📘 Physics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers