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April 20, 2014

Homework Help: Math Analysis

Posted by Emily on Wednesday, January 6, 2010 at 11:03pm.

What is the apparent size of an object 1 cm long held 80 cm from your eyes?

==> When they say "apparent size", they mean the angle from which one object is viewed by, say, a person (or in this case a pair of eyes). I thought I'd be able to find the angle by using the formula s = r*a (arc length [or diameter] equals the radius times the angle). However, I'm missing the diameter of the eye, so I can't use this formula. Does anyone have any idea how to solve this? Any help is GREATLY appreciated! :)

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