Question

Q. 6. Name the scientists who discovered or invented the following-
(1) Cyclotron, (ii) Lightning conductor, (iii) System of reading and
writing for blind, (iv) Cosmic rays, (v) Television.​

Answer 1

ans

1.cyclotron : Ernest Lawrence in 1929-1930 at university of California.

2.Lightning conductor : Benjamin Franklin

In 1772, he was the first to show that a thunderstorm lets out electricity.

3.System of reading and writing for blind :

Louis Braille. 4 January 1809 – 6 January 1852) was a French educator and inventor of a system of reading and writing for use by the blind or visually impaired.

4.Cosmic rays : Cosmic rays were discovered in 1912 by Victor Hess

5.Television : Philo Taylor Farnsworth (August 19, 1906 – March 11, 1971) was an American inventor and television pioneer.

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