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Title: Without glasses, a person can comfortably read a magazine when it is held at 60 cm from his eyes. ... Post by: Chery on Dec 5, 2016 Without glasses, a person can comfortably read a magazine when it is held at 60 cm from his eyes. What should be the focal length of his contact lenses to allow him to read the magazine comfortably at a distance of 30 cm?
A) -30 cm B) +30 cm C) -60 cm D) +60 cm E) +90 cm Title: Re: Without glasses, a person can comfortably read a magazine when it is held at 60 cm from his ... Post by: slicealemon on Dec 5, 2016 Content hidden
Title: Re: Without glasses, a person can comfortably read a magazine when it is held at 60 cm from his eyes. ... Post by: Chery on Jan 13, 2017 I needed this so much, thanks
Title: Re: Without glasses, a person can comfortably read a magazine when it is held at 60 cm from his eyes. ... Post by: slicealemon on Feb 16, 2017 Are you doing the questions found at the end of the chapter? They should help you with the others too
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