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Unformatted text preview: OPTI-202R Homework No. 5 Michael Descour Spring 2010 1 of 1 Assigned: 2/17/10 (Friday) Due: 2/24/10 (Wednesday) ANNOUNCEMENT: MIDTERM EXAM 1 ON FRIDAY, FEBRUARY 26, 2009 PRIME DIRECTIVE: Do all problems in this set using Gaussian methods. Except where noted, assume thin lenses in air. (5-1) (20 pts.) Eyeglasses are used when the focus of the eye does not fall on the retina. In myopia (nearsightedness), rays from a distant object focus in front of the retina. In hyperopia (farsightedness), these rays focus behind the retina. For the purposes of this problem, the eye can be modeled as a spherical refracting surface of index n . (a) Eyeglasses are usually placed near the front focal point of the eye (assume they are at F ). If φ g is the power of the eyeglasses and φ e is the power of the eye, what is the total system power? (b) Based on this answer, how do eyeglasses work? (c) What happens if the eyeglasses are not at the front focal point of the eye?...
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This note was uploaded on 05/23/2010 for the course OPTI 202r taught by Professor Greivenkamp during the Spring '08 term at Arizona.
- Spring '08