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accepted action Albert American Ampere Ampere's animals appeared attraction Baird became began Bell body born Bose C.V. Raman Calcutta called close College colours complete concept continued contribution Darwin death demonstration developed died direction discovered distance early earth effect Einstein electric electromagnet energy engine established existence experiments explained fact father field force gave gravitational hand idea interest invention Isaac Italy Jagadish Chandra Bose known later lectures light lived London magnetic mathematical matter measure mechanical method Morse motion move nature never Newton observed original particles patent phenomena philosopher physicist physics plants possible principle problem professor published questions received relativity Royal Society scientific scientists showed soon sound space studies success surface telegraph television theory took transmitted United University Watt wire young