A typical human eye is nearly spherical and usually about, Ask an Expert

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A typical human eye is nearly spherical and usually about 2.5 cm in diameter. Suppose a person first looks at a coin that is 2.3 cm across and located 30.0 cm from her eye and then looks up at her friend who is 1.8 m tall and 3.25 m away.

A) Find the approximate size of each image (coin and friend) on her retina. (Hint: Just look at rays from the top and bottom of the object that pass through the center of the lens.)

B) Are the images in part (a) upright or inverted and are they real or virtual?

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