Thin Lens And Lens Maker Equations Video Lessons

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Problem: A 2.0-cm-diameter spider is 2.0 m from a wall.Determine the focal length and position (measured from the wall) of a lens that will make a half-size image of the spider on the wall.

FREE Expert Solution

Lens equation:
1so+1si=1f

Magnification:

m=hiho=-siso

The distance between the object and the image is:

so + si = 2.0 m

Magnification, m = -si/so = 1/2

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Problem Details

A 2.0-cm-diameter spider is 2.0 m from a wall.

Determine the focal length and position (measured from the wall) of a lens that will make a half-size image of the spider on the wall.

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