http://www.youtube.com/watch?v=Wav-mP9EUMc

A clip from the big bang theory showing Ethnicity shown in a very stereotypical way.

Raj is represented to be a very outcast which is sometimes hinted towards in his ethnicity saying that he is a stereotypical 21st century 'forein kid'. Making out like he has moved along with technology and social advances where as his parents are still old fashion to the letter religious and strict. They show this by dressing him in very non-student clothing wearing a sweater vest and trousers instead of jeans. The camera is set at an angle so that it looks like you are part of the scene making them seem even more just like normal stereotypical 'geeks'.