Legality of Cannabis by U.S. Jurisdiction

Magnification_power_of_a_loupe.png ‎(733 × 419 pixels, file size: 58 KB, MIME type: image/png)

Description
English: The magnification power of a loupe is given by , where 25 centimeter is the near limit of the normal eye. When the virtual image is not at infinity but at the near point, the angular magnification is
Date and 2012
Source Own work, from Through Magic Glasses and Other Lectures
Author Pieter Kuiper and Arabella B. Buckley
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Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Magnification_power_of_a_loupe.png

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author name string: Pieter Kuiper
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current20:10, 24 March 2012Thumbnail for version as of 20:10, 24 March 2012733 × 419 (58 KB)Pieter Kuiper{{Information |Description ={{en|1=The magnification power of a loupe is given by <math>M=\frac{25 \mathrm cm}{f}</math>, where 25 centimeter is the near limit of the normal eye.}} |Source ={{own}}, from [http://www.gutenberg.org/files/37589...
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source: https://en.wikipedia.org/wiki/File:Magnification_power_of_a_loupe.png