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Ask the Physicist!

Do you have a question related to physics? Most questions will have the answers posted at this website. Submit your question below and I will attempt to answer as quickly as possible. If you do not submit a valid email address, I will not answer your question. If you do not receive an answer, check here to see if your email was invalid. Please read the groundrules for the site. If the answer is to your liking, you might want to consider making a donation to help support this service. A history of past questions and answers may be seen by clicking here.

New policies:

  1. This site is becoming increasingly popular so it is taking up my time disproportionately to the amount of donations I have received. In future, questions which
     
    1. violate groundrules,
    2. are what I consider "off the wall", or
    3. are not likely to be of general interest to the many people I know read the answers

will simply be discarded. In the past I have tried to answer all questions even if the answer is simply that I won't or can't answer, but that is becoming too time consuming. If you don't get an answer within a week or two, you can always ask again with a "plea"; no guarantees, though.

  1. If your question is clearly astronomy or astrophysics, particularly detailed questions about black holes, stellar evolution, dark matter or energy, the big bang, etc., areas in which I am not expert, please direct your question to "Ask the Astronomer".

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