Apparent and actual radius (Optics!)


by Healthycola
Tags: optics, perception
Healthycola
Healthycola is offline
#1
Jan22-13, 03:21 PM
P: 1
I know the radius of a circle. I'm taking pictures of the circle as I bring it closer to the camera. Obviously the radius is getting larger. I want to know what the relationship is to find this out? I know the distance from the camera that the circle is at all times.
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jtbell
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#2
Jan22-13, 03:26 PM
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I think the concept you're looking for is linear magnification a.k.a. transverse magnification:

http://hyperphysics.phy-astr.gsu.edu...ensdet.html#c2


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