Who discovered that the planet Venus has phases similar to the Moon, supporting the heliocentric theory? MCQ with Answer and Explanation

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Who discovered that the planet Venus has phases similar to the Moon, supporting the heliocentric theory?

A. Tycho Brahe

B. Nicolaus Copernicus

C. Galileo Galilei

D. Johannes Kepler

Answer: Option C

Solution (By JKSSB Mock Tests)

Galileo Galilei observed the phases of Venus in 1610 using his telescope, confirming that it orbits the Sun.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

Who invented the lightning rod and bifocal lenses?

A. Nikola Tesla

B. Benjamin Franklin

C. Michael Faraday

D. Thomas Edison

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Correct Answer: Option B

Explanation:
Benjamin Franklin invented the lightning rod, bifocal spectacles, and the Franklin stove.

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Question #2

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

A. J.J. Thomson

B. Charles Thomson Rees Wilson

C. Ernest Rutherford

D. Robert Millikan

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Correct Answer: Option B

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.

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Question #3

The invention of the common mechanical pencil sharpener layout with internal planetary gears was patented by whom?

A. Christopher Sholes

B. John Lee Love

C. Walter Hunt

D. Nicolas Conté

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Correct Answer: Option B

Explanation:
African-American inventor John Lee Love patented the simple, functional portable mechanical sharpener layout ('Love Sharpener') in 1897.

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