<P> Raj is Howard Wolowitz's (Simon Helberg) best friend, with whom Raj shares what Nayyar calls a "bromance", although the relationship is frequently made awkward by Raj's metrosexuality . Raj works as an astrophysicist in the Physics Department at Caltech . He had selective mutism, which did not allow him to talk to women outside of his family unless he was under the influence of alcohol (or medication), until the season 6 finale . Along with Howard, Sheldon Cooper, and Leonard Hofstadter, Raj is one of the four characters to appear in every episode of The Big Bang Theory . </P> <P> Rajesh, who is normally called Raj or just by his surname Koothrappali, is from New Delhi, India . However, he despises Indian food, and his knowledge about Indian culture and Hinduism is often rebuked by Sheldon, who is seen to speak better Hindi than him . He was born into a wealthy family and has five siblings, one of whom is Priya, a former on - off girlfriend of Leonard . Raj is normally seen wearing a layered combination of a printed shirt and sweater vest under a track top - style windbreaker with khakis or cargo pants and skate shoes . Raj wore a red cap in the pilot episode, but has not worn any headgear on a regular basis for the rest of the series' run . Between seasons one and eleven, Raj styled his naturally curly hair with hair gel "while trying to blend in". </P> <P> Raj joins in playing Halo online and trading - card games with his friends, and has even claimed to have experienced gaming addiction in the past . It was revealed in "The Monster Isolation" that Raj did at least part of his higher education at the University of Cambridge, where he discovered his interest in astrophysics . </P> <P> While in general Raj is more patient with Sheldon than Leonard, Howard or Penny, Sheldon is completely oblivious to this, and even casually cuts him off as a friend on one occasion . </P>

Where did raj from big bang go to college