How Much Must the Focal Length of an Eye Change

question 28

Multiple Choice

How much must the focal length of an eye change when an object, originally at 4.00 m, is brought to 40.0 cm from the eye? Assume a 2.5-cm distance between the eye lens and retina.

• A) 0.13 cm
• B) 2.48 cm
• C) 2.35 cm
• D) 2.50 cm
• E) 0.19 cm

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