Question

A typical human eye is nearly spherical, and is usually about 2.5 cm in diameter. Suppose a person first looks at a coin that is 2.1 cm in diameter and located 29.0 cm from her eye. Then, she looks up at a friend who is 1.7 m tall and 4.00 m away. Find the approximate size of each image (coin hı,coin and friend hi,friend) on her retina. (Hint: Just consider rays from the top and bottom of the object that pass through the center of the lens.) hi,coin = cm hi,friend cm The images on her retina are and

Answer 1

Solution Using preferty of triangles 1 - width 2 Wiolth distancet distence 2.1 ( 29 2.5 (= 0.1810344 cm ( size of ten on retina) property of thongle. using Width L distenici widtha destenca ga 1.7 4 215 (= 1.0625 cm ( size of friend on relian) A The Image are real and Invelted