Which way is good to communicate or deal with my advisor about research issues? writing an email or talking directly with my professor? What would you do if your professor is busy to check your email and also to talk with you in person? Is there any other option to communicate with my professor about the problem easily and politely?
I am a new PhD student and have some issues to deal with my advisor. So my advisor do not respond to my emails I sent him previously till today. I tried also to talk with him in person but he said that he doesn't have time to talk now. What should I do? how long do I have to wait for his respond? What does it mean when a professor is not willing to respond to his student email?