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Physics - Technology and Society

Technology is the application of various laws, doctrines of physics for practical purposes. Practical applications of physics and other branches of sciences have played a very important role in the development of industry and in improving the standard of living of man.


The understanding of electromagnetic waves in the longer wavelength domain has found applications in radio, television and wireless communication.

Television programs from the distant countries can be watched ‘live’ via satellites. The satellite communication has resulted in bringing the world to the tabletop.
 

These satellites also help in forecasting weather and in geophysical survey such as exploration of oil wells. The electricity that we use in our homes and industry is generated at a power plant by the conversion of some other form of energy into electrical energy.
 

Nuclear energy released in a fission process is the source of energy in a nuclear reactor which produces electricity.
 

A host of other applications of physics have contributed a great deal to the technical advancement of society. Our society, today is becoming more and more science oriented. Thus physics plays a very significant role in technology and in our daily lives.
 

Some Physicists from Different Countries of the World and their Major Contributions

Name

Major Contribution / Discovery

Country of Origin

Archimedes

Principle of buoyancy; Principle of the lever

Greece

Galileo Galilei

Law of inertia

Italy

Christiaan Huygens

Wave theory of light

Holland

Isaac Newton

Universal law of gravitation; Laws of motion; Reflecting telescope

U.K.

Michael Faraday

Laws of electromagnetic induction

U.K.

James Clerk Maxwell

Electromagnetic theory; Light-an electromagnetic wave

U.K.

Heinrich Rudolf Hertz

Generation of electromagnetic waves

Germany

J.C. Bose

Ultra short radio waves

India

W.K. Roentgen

X-rays

Germany

J.J. Thomson

Electron

U.K.

Marie Sklodowska Curie

Discovery of radium and polonium; Studies on natural radioactivity

Poland

Albert Einstein

Explanation of photoelectric effect; Theory of relativity

Germany

Victor Francis Hess

Cosmic radiation

Austria

R.A. Millikan

Measurement of electronic charge

U.S.A.

Ernest Rutherford

Nuclear model of atom

New Zealand

Niels Bohr

Quantum model of hydrogen atom

Denmark

C.V. Raman

Inelastic scattering of light by molecules

India

Louis Victor de Borglie

Wave nature of matter

France

M.N. Saha

Thermal ionisation

India

S.N. Bose

Quantum statistics

India

Wolfgang Pauli

Exclusion principle

Austria

Enrico Fermi

Controlled nuclear fission

Italy

Werner Heisenberg

Quantum mechanics; Uncertainty principle

Germany

Paul Dirac

Relativistic theory of electron; Quantum statistics

U.K.

Edwin Hubble

Expanding universe

U.S.A.

Ernest Orlando Lawrence

Cyclotron

U.S.A.

James Chadwick

Neutron

U.S.A.

Hideki Yukawa

Theory of nuclear forces

Japan

Homi Jehangir Bhabha

Cascade process of cosmic radiation

India

Lev Davidovich Landau

Theory of condensed matter; Liquid helium

Russia

S. Chandrasekhar

Chandrasekhar limit, structure and evolution of stars

India

John Bardeen

Transistors; Theory of super conductivity

U.S.A.

C.H. Townes

Maser; Laser

U.S.A.

Abdus Salam

Unification of weak and electromagnetic interactions

Pakistan





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