I've read a lot about admissions from a lot of websites and they all seem to say the same thing. They'd prefer a physics or applied physics degree, or a closely related science disciplin. However, the most important thing in any application is that you demonstrate the potential for success. If you can show them that you have oustanding potential in physics and that you are likely to succeed with flying colors, you will be considered for admission. If your background is lacking, you will need to play catchup. Get a head start, show them what you know.