| TESLA, NICOLA ( 1836-1943 ) : |
| The SI unit of magnetic field is named in his honour. He was yugoslov scientist, invented induction motor, the poly phase system of ac power and high frequency induction coil ( the Tesla coil ).
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| HERTZ, HEINRICH RUDOLF ( 1857 - 1894 ) : |
| The SI unit of frequency is named in his honour. He was German physicist who was the first to broadcast and receive radio waves. He also pioneered research on discharge of electricity through gases, and discovered the photoelectric effect.
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| BOSE, JAGADISH CHANDRA ( 1858-1937 ). |
| He produced in 1895, ultra short radio waves, He was Indian Physicist and plant physiologist He invented highly sensitive instruments for the detection of minute responses by living organisms to external stimuli.
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| JEAN - AUGUSTIN FRESNEL ( 1788-1827 ) |
| He was a french engineer, who demonstrated two slit interference, explained the whole range of diffraction effects from all apertures and at all distances. He gave the general theory of light propagation in crystals; the motion of light in a moving. medium and much more.
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| JEAN - BERNARD FOUCAULT: ( 1819-1868 ) |
| He was French experimenter who measured the speed of light in water and air accurately and supported Huygens Wave theory. He studied gyroscopic motions and demonstrated the earth's rotation by the change in the plane of oscillation of a pendulum.
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| ALBERT ABRAHAM MICHELSON: ( 1852-1931 ) |
| He was a genius American experimenter who measured the speed of light with steadily improving accuracy over a long career. The experiment which he performed with Morley failed to final changes in the speed of light produced by motion with respect to the ether and thus laid the foundation for special relativity.
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| THOMSON, SIR JOHN JOSEPH: ( 1856 - 1940 ) |
| He discovered the electron by his ingenious experiments on discharge of electricity through gases, He was a British scientist who investigated the nature of cathode rays.
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| CHRISTAAN HUYGENS ( 1629 - 1695 ): |
| He discovered the actual geometry of Saturn's rings. He was a Dutch physicist, astronomer, mathematician and the founder of the wave theory of light. His book is "Treatise on Light".
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