Originally from New Jersey and a graduate of Princeton University, Leonard works as a Caltech experimental physicist, mainly working with lasers, and shares an apartment with colleague Sheldon Cooper in Pasadena, California. He is usually seen wearing his characteristic black thick-framed glasses, low-cut black Converse All Stars sneakers, pastel hoodies or neutral-colored sweat jackets and physics-themed T-shirts.
His various girlfriends have tried to change his outfits: Penny had no success while Stephanie got him to wear dress shirts and sweaters (which he found uncomfortable), and Priya got him to briefly switch to dress shirts, waistcoats and dark slacks; he reverted to his original outfits after she leaves for India, but started eschewing his hoodies in favour of unbuttoned safari shirts and non-hooded jackets towards the end of the seventh season, a trend that continued into successive seasons.
