science and technology during the fourth decade of 20th century (1930-40)

Q.Point out the advancement in science and technology during the fourth decade of 20^th century (1930-40)

Ans:=Television was invented in 1936 by Baired. It is an instrument images by the help of telegraphy. Gas turbine engine was also invented during this period. Hydroelectricity began to be produced by building huge dams. Newsfabrics like nylon, rayon and orlon were also developed by scientists. Muller discovered the insecticide like D.D.T in 1940.

Q.Sketch in brief the advancement in science and technology in the fifth decade of the century.

Ans:=During the fifth decade ot the 20^th century Sir Alexander Flemming of England invented penicillin, which is now used in the treatment of many diseases. Scientist,were also able to generate Atomic or Nuclear Energy during this period.The Americans designed the atomic bomb in 1945 and dropped and destroyed the two cities of japan,Hiroshima and Nagasakhi during this period.The aeroplanes faster than sound were manufactured in 1947.This period also saw the construction of transmitters and electric computers.

Q.Narrate briefly the story of the conquest of space for the first time in the world.

Ans:-The work of the conquest of the space started in 1935.The first rocket,’Sputnik’ was launced by Russia in 1957.From this time onwards the world entered the space age.Yuri Gagarin of Russia was the first man who flew into space in 1961.The USA landed on the moon first at all in 1961 A.D. Communication satellites orbiting the earth began to transmit T.V. programmes.