Investment firm Think Investments has invested a little over ₹136 crore in edtech firm Physics Wallah as part of a pre-IPO funding round. The investor picked up 1.07 crore equity shares, amounting to a 0.37% stake in Physics Wallah from 14 employees of the edtech firm. Physics Wallah is preparing to launch its ₹3,480-crore IPO on November 11.