Sir J.C. Bose did his original scientific work in the area of Microwaves. He made his own equipment by employing an illiterate tin-smith whom he trained up to do the job for him. He produced extremely short waves and done considerable improvement upon Hertz's detector of electric waves. He produced a compact appratus for generating electromagnetic waves of wavelengths 25 to 5 mm and studying their quasioptical properties, such as refraction, polarization and double refraction. These could be demonstrated by his compact apparatus mounted on an ordinary spectrometer table. The most satisfactory polarizers and analyzers were made out of pressed jute fibres or books with laminated pages. He could even produce rotation of plane of polarization by transmission of electric rays through bundle of twisted jute fibres. The originality and simplicity of his apparatus were its remarkable features. Bose's research on response in living and non-living led to some significant findings: in some animal tissues like muscles, stimulation produces change in form as well as electrical excitation, while in other tissues (nerves or retina), stimulation by light produces electric changes only but no change of form. He showed that not only animal but vegetable tissues under different kinds of stimuli-mechanical, application of heat, electric shock, chemicals, drugs- produce similar electric responses.
the microwave transmitter developed by bose
No comments:
Post a Comment