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Old Jul 3rd 2009, 04:51 AM   #11
Join Date: Jun 2009
Posts: 79
wow,i've been trying to do this one part of the question for almost 6 days now and I still can't figure it out.I've tried everything I could think of,from re-revising my notes to quite literally banging my head on the desk,and I stillcan't get it right.whatever method i try i always end up with -2D

Think of the eye-lens + corrective lens as one unit with focal length f and power P. The object for this is at 50 cm and image is at 2.3 cm.
Isn't the object at 25cm for the lens combination?or is it at 50cm?

1/f = 1/u + 1/v since object is at 25 cm and image has to be at 2.3 cm
Thank you,for this and, for the last post,i couldn't find the thanks button for the last one ,the button's missing!
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