User talk:Kohlik17

Welcome!

Hello, Kohlik17, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful: I hope you enjoy editing here and being a Wikipedian! Please sign your messages on discussion pages using four tildes ( ~ ); this will automatically insert your username and the date. If you need help, check out Questions, ask me on my talk page, or ask your question on this page and then place  before the question. Again, welcome! --Srleffler (talk) 04:52, 9 December 2011 (UTC)
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In response to your feedback
The reasons for that is spam prevention. Unfortunately, a lot of people create accounts just to upload spam or garbage images to Wikipedia, so we had to implement a waiting period before images could be uploaded. Sorry =( Is there an image I can help you upload?

&spades;PMC&spades; (talk) 21:47, 5 December 2011 (UTC)

December 2011
Your addition to Fresnel equations has been removed, as it appears to have added copyrighted material to Wikipedia without permission from the copyright holder. For legal reasons, we cannot accept copyrighted text or images borrowed from other websites or printed material; such additions will be deleted. You may use external websites or publications as a source of information, but not as a source of article content such as sentences or images. Wikipedia takes copyright violations very seriously and persistent violators will be blocked from editing. -- SoCalSuperEagle ( talk ) 22:10, 5 December 2011 (UTC)
 * The material appears to have been copied from http://www-scf.usc.edu/~kallos/light1.htm --Srleffler (talk) 05:36, 7 December 2011 (UTC)

Augustin-Jean Fresnel versus Fresnel equations
The Fresnel equations are a set of equations that describe the behaviour of light when moving between media of differing refractive indices. Fresnel is a dead French engineer. These topics are related for sure! But they are not the same topic! Some facts belong in both articles, like how Fresnel discovered the Fresnel equations. Other facts belong in the article on Fresnel but not the article on Fresnel equations, like the fact that Fresnel's name is written on the Eiffel tower. Other facts belong in the article on Fresnel equations but not the article on Fresnel, like the formula for critical angle. The point is that everything should be on-topic. (But your good intentions are appreciated!) Best wishes, :-) --Steve (talk) 13:57, 7 December 2011 (UTC)

Copyright violations, and difference between textbook and encyclopedia
Hi. I had to remove the material you added to Fresnel equations today, because it appears to be at least partly copied from http://www.teknik.uu.se/ftf/education/ftf2/Optics_FresnelsEqns.pdf. Wikipedia takes copyrights very seriously. We cannot accept material that has been copied from another source unless it is clear that the copyright owner approves, or the material has been released under one of a few specific public licenses.

Even if copyright were not a problem, this material would probably not be suitable for Wikipedia. By policy, Wikipedia is not a textbook. Encyclopedia articles have a different writing style than a textbook, and cover material differently. In particular, derivations are usually out of our scope. Our primary role is not to teach someone how to derive Fresnel's equations, but rather to provide an introduction to the equations, what they mean, and how they are used. Our article should provide references to other sources where readers can find more detail, including a derivation.--Srleffler (talk) 03:09, 13 December 2011 (UTC)