Monday, July 5, 2021

MILLIKAN'S OIL DROP EXPERIMENT......

1.  Oil droplets in the form of mist , produced by the atomiser , were allowed to enter  through  a tiny hole in the upper plate of electrical condenser ..............

2.  The downward motion of these droplets was viewed through the TELESCOPE , equipped  with a micrometer eyepiece...

3. Measuring the rate of fall of these droplets, Millikan's was able to measure the mass of oil droplets . The air inside the chamber was ionized by passing a  beam of X-rays through it....

4. The electrical charge on these oil droplets was acquired by collisions  with electron....

5. The fall of these charged oil droplets can be retarded , accelerated or made stationary depending upon charge on the droplets and the polarity and strength of the voltage applied to the plate..

6. Millikan concluded that the magnitude of electrical charge, 'Q' o the droplets is always an  integral multiple  of the  electrical charge , 'E' that is q = ne, where  n = 1,2,3,.....




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