The cosmic microwave background radiation, confirming the Big Bang theory, was discovered by whom? MCQ with Answer and Explanation

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

A. Stephen Hawking

B. Edwin Hubble

C. Albert Einstein

D. Arno Penzias and Robert Wilson

Answer: Option D

Solution (By JKSSB Mock Tests)

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

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered the composition of water as a compound of hydrogen and oxygen gases?

A. Henry Cavendish and Antoine Lavoisier

B. John Dalton

C. Robert Boyle

D. Joseph Priestley

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Correct Answer: Option A

Explanation:
Henry Cavendish observed that burning hydrogen produces water, and Antoine Lavoisier correctly identified it as a compound rather than a base element.

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Question #2

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Who invented the mercury thermometer in 1714?

A. Lord Kelvin

B. Daniel Gabriel Fahrenheit

C. Galileo Galilei

D. Anders Celsius

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Correct Answer: Option B

Explanation:
Daniel Gabriel Fahrenheit invented the mercury-in-glass thermometer in 1714 and developed the Fahrenheit scale.

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Question #3

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Who discovered that cosmic celestial entities emit radio signals, establishing the branch of Radio Astronomy?

A. Guglielmo Marconi

B. Grote Reber

C. Karl Jansky

D. Edwin Hubble

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Correct Answer: Option C

Explanation:
Jansky discovered radio emission noise origins from the galactic center in 1931 using directional rotating antenna arrays at Bell Labs.

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