Thin Lens And Lens Maker Equations Video Lessons

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Problem: Suppose the distance from the lens system of the eye (cornea + lens) to the retina is 18 mm. What must the power of the lens be when looking at an object 20.0 cm from the eye? 

FREE Expert Solution

Lens equation:
1so+1si=1f

Power of a lens:

D=1f

si = 18mm(1m/1000mm) = 0.018 m

so = 20.0cm(1m/100cm) = 0.2 m

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Problem Details

Suppose the distance from the lens system of the eye (cornea + lens) to the retina is 18 mm. 

What must the power of the lens be when looking at an object 20.0 cm from the eye? 

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