For most students, it is best to apply directly to the PhD program.
Students usually enter our department through the PhD program. It is not necessary to already have a Masters degree (i.e., a Bachelor's degree is sufficient) to be admitted directly to the PhD program. Financial support through graduate assistantships is awarded exclusively to students entering PhD program. We generally accept students into the MS program only if they have their own support (through a scholarship for example).
If you do not need support of a Graduate Assistantship, you are welcome to apply to a Masters degree in Physics.
The Masters of Sciecne (MS) degree involves original research and we have Thesis and non-Thesis options. The MS degree is a full time program so that students need to have their own support such as an external scholarship. The Masters of Arts (MA) degree is based on graduate coursework. This is a flexible program and may be pursued full-time or part-time or part time. You should choose the best option that meets your goals.