- answers

I am not sure what level of physics you would like to know about, so this is going to be a bit of a vague answer.
What I can suggest is that you go to this link, online physics programs.
Now, as for the length of time, that is dependent on how much education you have completed thus far. You will need to take a close look at the online physics programs that are offered, and determine which one will best suit you educational goals.
Good Luck!?
- related questions
Which are different specializations offered in MBA college in Bangalore?
the best college in Darbhanga?
Can I take an online course in real estate approved by the State of West Virginia?
Is there a state or national certification test for Psychotherapists? There is no licence to be psychotherapist, but how about certification?