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 cosmic microwave background radiation, confirming the Big Bang theory, was discovered by whom?

A. Albert Einstein

B. Arno Penzias and Robert Wilson

C. Stephen Hawking

D. Edwin Hubble

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Correct Answer: Option B

Explanation:
Arno Penzias and Robert Wilson accidentally discovered cosmic microwave background radiation in 1964, winning a Nobel Prize.

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Question #2

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Who discovered that electrical currents alter physical molecular rotation under polarized light fields, establishing the Faraday Effect?

A. Heinrich Hertz

B. Hans Christian Ørsted

C. James Clerk Maxwell

D. Michael Faraday

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Correct Answer: Option D

Explanation:
Faraday proved electromagnetism and optical light travel systems interact directly by rotating light polarization planes using magnetic fields in 1845.

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Question #3

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The invention of the carbon filament telephone transmitter (microphone) that improved long-distance audio was done by whom?

A. Thomas Edison

B. Alexander Graham Bell

C. David Edward Hughes

D. Nikola Tesla

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Correct Answer: Option A

Explanation:
Thomas Alva Edison invented the highly efficient carbon microphone, which became standard for telephone transmitters for decades.

This question belongs to: Static General Knowledge Inventions and Discoveries

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