Bengali scientist Jagadish Chandra Bose (1858-1937) lecturing on the "nervous system" of plants at the Sorbonne in Paris in 1926.Bose's 60 GHz microwave apparatus at the Bose Institute, Kolkata, India. His receiver (left) used a galena crystal detector inside a horn antenna and galvanometer to detect microwaves. Bose invented the crystal radio detector, waveguide, horn antenna, and other apparatus used at microwave frequencies.
