Who was the first person to measure the speed of light?
- Faucault
- Hoffman
- Maxwell
- Marconi
Michel Foucault (French pronunciation: [miʃɛl fuko]), born Paul-Michel
Foucault (15 October 1926 – 25 June 1984), was a French philosopher,
social theorist and historian of ideas. He held a chair at the Collège
de France with the title "History of Systems of Thought," and lectured
at the University at Buffalo and the University of California, Berkeley
Who invented the air conditioner?
- Lawrence
- Carrier
- Marcony
- C.Sholes
Willis Haviland Carrier (November 26, 1876 – October 7, 1950) was an
American engineer and inventor, and is known as the man who invented
modern air conditioning.
Who was the inventor of printing press?
- Colt
- Anderson
- S.samuel
- Gutenberg
Johannes Gensfleisch zur Laden zum Gutenberg (c. 1398 – February 3,
1468) (English pronunciation: /jəʊˌhanəs ˈguːtənbɛː(r)k/ yoh-han-uhss
goo-tuhn-bairk)[1] was a blacksmith, goldsmith, printer, and publisher
who introduced the printing press.
Who invented the microphone?
- Chetier
- Edison
- Berliner
- Newton
Emile Berliner or Emil Berliner (May 20, 1851 – August 3, 1929) was a
German-born American inventor. He is best known for developing the disc
record gramophone (phonograph in American English). He founded The
Berliner Gramophone Company in 1895, The Gramophone Company in London,
England, in 1897, Deutsche Grammophon in Hanover, Germany, in 1898 and
Berliner Gram-o-phone Company of Canada in Montreal in 1899
Who invented the Polaroid camera?
- Anton Van Leeuwenhoek
- Edwin Land
- T.S.Moore
- Z.Jansen
Edwin Herbert Land (May 7, 1909 – March 1, 1991) was an American
scientist and inventor, best known as the co-founder of the Polaroid
Corporation. Among other things, he invented inexpensive filters for
polarizing light, a practical system of in-camera instant photography,
and his retinex theory of color vision. His Polaroid instant camera,
which went on sale in late 1948, made it possible for a picture to be
taken and developed in 60 seconds or less
Who invented the aeroplane?
- Carrier Brothers
- Moore Brothers
- Wright Brothers
- Sirkorski Brothers
The Wright brothers, Orville (August 19, 1871 – January 30, 1948) and
Wilbur (April 16, 1867 – May 30, 1912), were two Americans
credited[1][2][3] with inventing and building the world's first
successful airplane and making the first controlled, powered and
sustained heavier-than-air human flight, on December 17, 1903. In the
two years afterward, the brothers developed their flying machine into
the first practical fixed-wing aircraft. Although not the first to build
and fly experimental aircraft, the Wright brothers were the first to
invent aircraft controls that made fixed-wing powered flight possible
Who was the founder of the wave theory of light?
- Christiaan Huygens
- Issac Newton
- Louis Fizeau
- E. Torricelli
Christiaan Huygens, FRS (English pronunciation: /ˈhaɪɡənz/, [ˈɦœyɣə(n)s]
( listen); (14 April 1629 – 8 July 1695) was a prominent Dutch
mathematician, astronomer, physicist and horologist. His work included
early telescopic studies elucidating the nature of the rings of Saturn
and the discovery of its moon Titan, the invention of the pendulum clock
and other investigations in timekeeping, and studies of both optics and
the centrifugal force
Who invented the commercial typewriter?
- C. Sholes
- S. Huges
- G. Daimler
- E. Swinton
Ans: The first typewriter to be commercially successful was invented in 1868
by Christopher Latham Sholes, Carlos Glidden and Samuel W. Soule in
Milwaukee, Wisconsin, although Sholes soon disowned the machine and
refused to use, or even to recommend it
Which scientist first determined the speed of light using a laboratory apparatus?
- Swan
- Newton
- B. Halt
- Louis Essen
Ans: Louis Essen FRS[1] O.B.E. (6 September 1908 – 24 August 1997) was an
English physicist whose most notable achievements were in the precise
measurement of time and the determination of the speed of light. He was
critical of Albert Einstein's theory of relativity, particularly as it
related to time dilation.
Which hormone was the first to be discovered?
- Pepsin
- Secretin
- Somatotrophin
- Melanin
Ans: Secretin
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