The crystalline lens of the human eye is double convex and has a typical range o

focal length f = 7 mm object distance p = 250 m image distance q = ? 1/p + 1/q = 1/f 1/250 + 1/q = 1/7 image distace = 7.2 mm

ID: 1497073 • Letter: T

Question

The crystalline lens of the human eye is double convex and has a typical range of optical power from 108 diopters to 143 diopters .

I ONLY NEED HELP WITH PART C

Part A - What is the raange of focal lengths the eye can achieve? (in mm); the answer is 7.00 mm for f min, and 9.25 mm for f max

Part B - At minimum power, where does it focus the image of a very distant object? (in mm)

The answer is 9.25 mm

Part C - At maximum power, where does it focus the image of an object at the near point of 25 cm? (in mm)

??????

focal length f = 7 mm

object distance p = 250 m

image distance q = ?

1/p + 1/q = 1/f

1/250 + 1/q = 1/7

image distace = 7.2 mm <<---answer

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