Einstein divided his Theory of Relativity into two parts i.e. Special and General.

(i)    Special Theory of Relativity:

Einstein discovered Special Theory of Relativity in 1905. The theory states speed of all things is relative to he observer. But  this is not so with the speed of light. It remains constant as long as the Earth revolves round the sun.

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(ii)    General Theory of Relativity:

It took Einstein 10 year to generalize  his  theory. Because it involved complex math. Till in 1915 he discovered that force of gravitation is distinguishable form the force produced due to Acceleration. And the When a light approaches a Big Mass it curves. This proved that time and Space are curved. In a way he proved that Curvature of Time and Space is Equal to Gravitation Force.

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3. NANO TECHNOLOGY – AN OUTSTANDING|ACHIEVEMENTS|SCIENCE

First of All we should be Clear  about the  size of a Nasnometer. There are 1,000,000 (One Million)  Nanometers in a Milometer. A nanometer is of 1/10 millionth of Thickness of common newspaper.

First time Professor  used the word Nanotechnology. But the Idea was hinted upon in a Lecture delivered  at American Physical Society  convention at California Ind Technology. by Richard  Feynman on the topic “There is Plenty of Room at the Bottom”  on 29th  December 1959. But about 10 years afterwards, when conceptual pursuit of ultra-precision machining by Prof. Norio tanguchi, he stumbled upon the nomenclature ‘Nanotechnology’ which has now become the order of the day.

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But actual nano technology began in 1981 with the Invention of Scanning Tunneling  Microscope and Atomic Force Microscope (AFM).  Because  ONLY then, the  scientists were able to observe the individual items.
With the capacity viewing the individual developed, the possibility of manipulating an individual atom or molecule was ushered in.