A compound lens system consists of two converging lenses, one at x=−20.0cm
 with focal length f
1
=+10.0cm
, and the other at x=+20.0cm
 with focal length f
2
=+8.00cm
. (Figure 1) An object 1.00
centimeter tall is placed at x=−50.0cm
.What is the location of the final image produced by the compound lens system? Give the x coordinate of the image.
Express your answer in centimeters, to three significant figures or as a fraction.
Now remove the two lenses at x=+20.0cm
 and x=−20.0cm
 and replace them with a single lens of focal length f
3
 at x=0
. We want to choose this new lens so that it produces an image at the same location as before.
Part D
What is the focal length of the new lens at the origin?
Express your answer in centimeters, to three significant figures or as a fraction.
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Posted 08 May 2017 02:05 AM
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