A few times, I embarrassed myself asking what I thought were truly original questions on Physics Forums, only to find that the answer is a link to a Wikipedia article. While the physicists may love answering questions that only they can answer, they might be annoyed by questions that people could answer best themselves given a little effort with Wikipedia in advance. The search engine on Wikipedia is primitive. It searches only titles and key words, not the full text of the articles. The techniques many of us have learned to use to refine Google searches don't work on Wikipedia. Sometimes, you can find what you seek by searching Google and finding the Wikipedia link in the Google results. I've learned a second, and more productive way. to search on Wikipedia. Start with any article related the the subject you want. As you read the article, follow promising sounding links embedded in the article, or listed at the bottom under "Related Topics" or "See also." When you find the article, if you have trouble understanding it, try following the embedded links in the article to learn about concepts or vocabulary you don't understand. When I do all that, I'm amazed at how often I learn the answer to my question within 30 minutes or less. As a bonus, I usually learn some things I wasn't searching for as a byproduct. I find, that a little active effort on my part using Wikipedia, can intercept 3/4 of the unnecessary questions posed to the Physicists. Perhaps newcomers to the forums would be well served with a little advice on the why and how of using Wikipedia before posting questions. Thanks everyone for Physics Forums. Physics Forums and Wikipedia IMO are both great public services.