Edtech unicorn PhysicsWallah, which will launch a Rs 3,480-crore initial public offering (IPO) on November 11, plans to double down on its offline network and diversify into new geographies, particularly in the South. The company, with around 300 offline centres, aims to have a total of 500 centres in three years, Alakh Pandey, cofounder and CEO of PhysicsWallah said.