scientist, discoveries & inventions MCQ section 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general awareness mcq - 4 EXERCISES
The following question based on scientist, discoveries & inventions topic of general awareness mcq
(a) Dr. Charles H. Jones
(b) Sir Frank Whittle
(c) T.H. Maiman
(d) Fred Morrisson
The correct answers to the above question in:
Answer: (c)
A laser is a device that emits light (electromagnetic radiation) through a process of optical amplification based on the stimulated emission of photons.
On May 16, 1960, Theodore H. Maiman operated the first functioning laser, at Hughes Research Laboratories, Malibu, California, ahead of several research teams, including those of Townes, at Columbia University, Arthur Schawlow, at Bell Labs, and Gould, at the TRG (Technical Research Group) company.
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Read more scientist discoveries and inventions Based General Awareness Questions and Answers
Question : 1
An anemometer measures which of the following ?
a) Speed of satellites
b) Speed of light
c) Speed of water current
d) Speed of wind
Answer »Answer: (d)
An anemometer is a device used for measuring wind speed. The term is derived from the Greek word anemos (wind). The first known description of an anemometer was given by Leon Battista Alberti in 1450.
Question : 2
A tachometer is a device used to measure
a) dispersive power
b) gravitational pull
c) surface tension
d) speed of rotation
Answer »Answer: (d)
A tachometer is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM).
Question : 3
Who of the following scientists proved that the stars with mass less than 1.44 times the mass of the Sun end up as White Dwarfs when they die?
a) Stephen Hawking
b) Steven Weinberg
c) Edwin Hubble
d) S. Chandrashekhar
Answer »Answer: (d)
Question : 4
Which of the following is Study of fossils ?
a) Palaeontology
b) Ethology
c) Anthropology
d) Etiology
Answer »Answer: (a)
Palaeontology is the study of fossils to determine the structure and evolution of extinct animals and plants and the age and conditions of deposition of the rock strata in which they are found. Body fossils and trace fossils are the principal types of evidence about ancient life.
Question : 5
Who is called the Father of Atomic Energy in India?
a) Dr. K.S. Krishna
b) None of the above
c) Prof. Satish Dhawan
d) Homi J. Bhabha
Answer »Answer: (d)
Question : 6
Leprosy bacillus was invented by
a) Harvey
b) Koch
c) Fleming
d) Hansen
Answer »Answer: (b)
Mycobacteriumleprae, the causative agent of leprosy, was discovered by G. H. Armauer Hansen in Norway in 1873. Hansen observed a number of non-refractile small rods in unstained tissue sections.
The rods were not soluble in potassium lye, and they were acid- and alcohol-fast. In 1879, he was able to stain these organisms with Ziehl’s method and the similarities with Koch’s bacillus (Mycobacterium tuberculosis) were noted.
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