OK, I've seen this question, or various incarnation of it, being asked several times on here. People with various background and trainings, ranging from engineering to computer science to business (luckily, no philosophy) want to know if they can use their degree to go on to physics graduate schools. I have a quick and easy way for you to check for yourself if you are (i) qualified and (ii) have the necessary background to do this IF you intend to go to a US educational institution. 1. Get a copy of the GRE Physics test and do it. If you did not score in the top 25% (see posts 4,5 and 6 for clarification), you may have a problem with adequate preparation. A practice test can be found here: http://www.ets.org/gre/subject/about/content/physics 2. Go to the physics department at the school that you wish/intend to attend. Ask for a copy of their old qualifying exams. Most departments do keep a copy of these (a few links to old qualifying exams from a number of schools can be found in this post). Now read the questions. Forget about trying to solve them correctly. Just read and try to understand what the question is asking. If you find that (i) any of the phrase, words, notations, etc. all sound foreign and unfamiliar to you, you lack the necessary background and knowledge right away; (ii) you know what they're asking, but you simply don't have a clue on where to even start attacking the problem, then you are inadequately prepared and may need to consider spending an extra year of enrolling in advanced undergraduate courses. These are two direct and concrete tests that you can do on yourself. It provides as clear of an indication as any if you have the necessary background. Zz.