Who discovered cosmic rays? MCQ with Answer and Explanation

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Who discovered cosmic rays?

A. Robert Millikan

B. Victor Hess

C. Enrico Fermi

D. Both

Answer: Option D

Solution (By JKSSB Mock Tests)

Victor Hess discovered cosmic rays.

This question belongs to: Static General Knowledge First in the World

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Question #1

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Who invented the traffic light?

A. Lester Wire

B. J.P. Knight

C. William Potts

D. Garrett Morgan

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Correct Answer: Option D

Explanation:
Garrett Morgan invented an improved traffic signal.

This question belongs to: Static General Knowledge First in the World

Question #2

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Who was the first person to map the ocean floor?

A. Sylvia Earle

B. Jacques Cousteau

C. Marie Tharp

D. William Beebe

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Correct Answer: Option C

Explanation:
Marie Tharp created the first comprehensive scientific map of the Atlantic Ocean floor.

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Question #3

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Who invented the hula hoop?

A. Wham-O

B. Ancient Hawaiians

C. Arthur Melin and Richard Knerr

D. Both A and C

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Correct Answer: Option D

Explanation:
Modern plastic version by Wham-O.

This question belongs to: Static General Knowledge First in the World

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