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Our Mission

Physics Forums aims to provide a community for students, scientists, educators or hobbyists to learn and discuss science as it is currently generally understood and practiced by the professional scientific community.

Our main focus is physics, but we also cater to other STEM fields including engineering, chemistry, biology, mathematics, etc.

STEM homework help for students is available, as well as academic and career guidance.

How to post

Important: When you want to ask a question, do not send a visitor message, do not ask in the library, do not post to another existing thread. You need to start a new thread.

Getting started: To start a new thread at this forum, you first need to go to the appropriate forum. You'll find a list of forums at our main page at When you have reached an appropriate forum, you click the "NEW TOPIC" button as displayed in the image below:

New Thread

If you do not wish to start a new thread, but merely reply to a post, then you should first go to the thread you wish to reply to. Then click the "QUOTE" button that is circled in the image below:

New Reply

Do not use the "Report" button for posting replies (the report button is the one which is crossed out in the previous image). This button sends a message to the mentors (moderators), and is used for reporting posts that you think violate our rules.

Some important remarks:
1) Homework questions and homework-style questions always belong in the homework forums: