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Ryo124
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Homework Statement
Suppose the lens in a human eye has far focal length equal to f0 = .0405 m, for distant objects to be in focus.
(a) An object K is 1.72 m from the lens. How much should the focal length change to focus on the object K?
(b) What is the magnification ( = image size divided by object size) for the object K?
Homework Equations
1/do + 1/di = 1/f
The Attempt at a Solution
I figured the image distance (di) to be .0415 m, but I'm unsure of how much the focal length should change to focus on the object K.
I tried subtracting the object distance from the focal length (vice versa), doesn't work.
I tried subtracting the image distance from the focal length (vice versa), didn't work.
I tried subtracting the object distance from the image distance (vice versa), incorrect.
Also, di/do is not giving me the correct magnification, it is not .241.
Someone help please. It looks like I'm going to miss my deadline but I still need to know how to solve this type of problem for the test.
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