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Inventions and Discoveries


7. 

Aeroplane was invented by

Answer : C. Orville and Wilber Wright

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8. 

Crystals dynamics was invented by

Answer : C. C.V. Raman

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9. 

who invented ultra violet rays?

Answer : A. Hershal

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10. 

Who is the scientist in whose honour the "chandra" X-ray telescope has been named?

Answer : D. Subramanyan Chandra Sekar

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11. 

Match List I correctly with List II and select your answer using the codes given below:

List I List II
a) Copernicus 1) Moons of jupiter
b) Kepler 2) Law of gravitation
c) Galileo 3) Helicocentric theory
d) Newton 4) Laws of planetary motion

Answer : D. a-3 ,b-4 ,c-1 ,d-2

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12. 

The force of attraction between planets was correctly given by

Answer : A. Kepler

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