× Registration for the 2018 Explorer Competition has opened on October 10 and will last until November 10.
× 2018 Premier Competition registration will open here on October 20 and will close on November 17. If you are competing in Korea or China, this is to be completed after submitting the hosting organization's own form (note: they may close registration earlier).
× The inaugural 2017 Explorer Competition (research-based online event) and 2017 Premier Competition (globally hosted onsite event) have completed. Explorer Competition submissions have been judged, and results are available here. In the meantime, everyone is invited to take part in our academically rewarding PhysiKarma initiative.


Launched in 2017, the non-profit organization is run by alumni of Princeton University Department of Physics who initially organized the Princeton University Physics Competition. While the operation of Physics Unlimited is entirely independent of Princeton University, the required level of coordination with relevant organizers of PUPC is maintained in order for our events to be successful.

At this time, Physics Unlimited is in charge of overseeing three types of events:

  1. the Explorer Competition, a research-based online assignment that students have a week to complete;
  2. the Premier Competition, a single-session, 1.5-hour international version of PUPC;
  3. the PhysiKarma initiative in partnership with Expii, an ongoing, academically rewarding - and stress-free - way to demonstrate your physics knowledge; PhysiKarma earners will be recognized on the 15th day of each month.
As of spring 2018, we are also laying groundwork for a new type of event: the Physics Makeathon, a hands-on project-based assignment that would incorporate elements of both maker space and hackathon. If you would like to be involved in any role, please consider answering a short questionnaire.

In all cases, to create an account, please proceed to this page. Once you have confirmed your e-mail and are logged in, please submit the short registration form through our portal, selecting the type of event and location.

Any remaining questions or clarifications, along with volunteer/host site requests, can be e-mailed to directors@physicsu.org. We look forward to hearing from you and to your participation in our events!