After he lectured at the Royal Society, scientific associations in many other countries invited Jagadishchandra Bose. He visited France, Germany, America and Japan besides England. He lectured at several places and explained his discoveries.

When electricity passes through a man, animal or plant, we say there is a 'shock'. When it is passed through a living being the being gets excited, 'irritated'. Bose developed an instrument that would show such a reaction of the organism on agraph. When electricity was passed through zinc, a non-living substance, a similar graph was obtained. So he came to the conclusion that living and non-living things were very similar in certain reactions.

In Paris he gave a lecture on this similarity between the living and the non-living world. Have you heard of 'radar`? This is a very wonderful scientific device. Sailors on the sea use it; it is also used to get information about aeroplanes coming towards a place. So you see how useful it is during a war. If the aeroplanes of the enemy try to attack a city, the radar shows their movement. J.C. Bose worked out some details of very great importance; these are being used in the working of the radar. When Jagadish chandra Bose again visited England, Cambridge University honoured him as a Professor.

Generally, when a man invents something new he declares that nobody can make use of it without his permission. If anybody desires to, make use of it, he will have to pay him money, Why? Because the inventor has worked hard and he has used his time and brains for his invention. It is not right to make use of his work without paying him. An inventor can make lakhs of rupees by just one or two inventions. Bose had invented many instruments. They have since been used by many industries. When he was offered money for these he did not accept it. He was very generous and noble; he felt that knowledge was not any one's personal property. He permitted any one the use of the fruits of his work.