File talk:Plastic Protractor Polarized 05375.jpg

Usage

This file has been used in: [| Science is Beauty]. Tension lines in plastic protractor seen under cross polarized light.. Tumblr. Retrieved on 2014-01-31. Tumblr TOS seems to contradict CC licence: When you provide Subscriber Content to Tumblr through the Services, you grant Tumblr a non-exclusive, worldwide, royalty-free, sublicensable, transferable right and license to use, host, store, cache, reproduce, publish, display (publicly or otherwise), perform (publicly or otherwise), distribute, transmit, modify, adapt (including, without limitation, in order to conform it to the requirements of any networks, devices, services, or media through which the Services are available), and create derivative works of, such Subscriber Content.

This file has been used in: [| Esther Inglis-Arkell] (2012-09-28). There’s a good, sensible reason why this protractor is a rainbow (in English). io9.