Who discovered that the element Uranium emits invisible energy streams, opening the radioactive field before Marie Curie? MCQ with Answer and Explanation

Question

Who discovered that the element Uranium emits invisible energy streams, opening the radioactive field before Marie Curie?

A. Ernest Rutherford

B. Wilhelm Röntgen

C. J.J. Thomson

D. Henri Becquerel

Answer: Option D

Solution (By JKSSB Mock Tests)

Becquerel left uranium compounds in a dark desk drawer with unexposed photographic plates, discovering they fogged without light exposure.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Who discovered that atomic particle paths can be tracked via condensation trails inside gas chambers, establishing the Cloud Chamber?

A. Charles Thomson Rees Wilson

B. Robert Millikan

C. Ernest Rutherford

D. J.J. Thomson

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Correct Answer: Option A

Explanation:
C.T.R. Wilson invented the cloud chamber in 1911 to study cloud formations, which became an invaluable tool for nuclear tracking and cosmic ray discoveries.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered that the velocity of light transitions through changing gravitational coordinates, establishing the gravitational redshift?

A. Arthur Eddington

B. Edwin Hubble

C. Albert Einstein

D. Isaac Newton

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Correct Answer: Option C

Explanation:
Einstein's General Theory of Relativity predicted that photons lose energy and shift toward lower frequencies when climbing out of a gravitational well.

This question belongs to: Static General Knowledge Inventions and Discoveries