The laser (Light Amplification by Stimulated Emission of Radiation) was first constructed by whom in 1960? MCQ with Answer and Explanation

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The laser (Light Amplification by Stimulated Emission of Radiation) was first constructed by whom in 1960?

A. Arthur Schawlow

B. Albert Einstein

C. Charles Townes

D. Theodore Maiman

Answer: Option D

Solution (By JKSSB Mock Tests)

Theodore Maiman built the first functioning laser in 1960 at Hughes Research Laboratories, using a synthetic ruby crystal.

This question belongs to: Static General Knowledge Inventions and Discoveries

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The invention of the modern pneumatic tire containing compressed inner air tubes was patented by which developer?

A. Robert William Thomson

B. Charles Goodyear

C. John Boyd Dunlop

D. Karl Benz

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Correct Answer: Option C

Explanation:
John Boyd Dunlop patented a highly successful commercial pneumatic tire in 1888 for his son's tricycle, reducing operational friction.

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Question #2

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Who discovered the atomic element Radium alongside his wife Marie Skłodowska-Curie?

A. Henri Becquerel

B. J.J. Thomson

C. Pierre Curie

D. Ernest Rutherford

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Correct Answer: Option C

Explanation:
Pierre Curie collaborated deeply with Marie Curie to physically extract radium chloride from radioactive raw pitchblende matrices.

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Question #3

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Who discovered the planet Ceres, the first recognized asteroid, in 1801?

A. Johannes Kepler

B. Giuseppe Piazzi

C. William Herschel

D. Heinrich Olbers

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Correct Answer: Option B

Explanation:
Italian astronomer Giuseppe Piazzi discovered Ceres on January 1, 1801, initially cataloging it as a new comet or planet.

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