Who discovered that light travels slower in dense mediums like water or glass than in a vacuum, confirming the wave theory? MCQ with Answer and Explanation

Question

Who discovered that light travels slower in dense mediums like water or glass than in a vacuum, confirming the wave theory?

A. Ole Rømer

B. Albert Michelson

C. Isaac Newton

D. Léon Foucault

Answer: Option D

Solution (By JKSSB Mock Tests)

Léon Foucault measured the speed of light in water using a rotating mirror device, refuting Newton's corpuscular particle model.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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The discovery of the charge-coupled device (CCD), which replaces film with digital sensor pixels in cameras, was made by whom?

A. Charles Kao

B. Theodore Maiman

C. Willard Boyle and George E. Smith

D. Fujio Masuoka

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Correct Answer: Option C

Explanation:
Boyle and Smith invented the CCD at Bell Labs in 1969, fundamentally altering digital imaging, which won them a 2009 Nobel Prize.

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Question #2

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Who invented the first practical electronic digital computer with binary logic architecture, known as the Z3?

A. Tommy Flowers

B. John von Neumann

C. Konrad Zuse

D. Alan Turing

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Correct Answer: Option C

Explanation:
German engineer Konrad Zuse completed the Z3 in 1941, recognized as the world's first functional program-controlled Turing-complete computer.

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Question #3

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Who discovered the presence of the Golgi apparatus within eukaryotic animal cells?

A. Santiago Ramón y Cajal

B. Theodor Schwann

C. Robert Hooke

D. Camillo Golgi

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Correct Answer: Option D

Explanation:
Italian physician Camillo Golgi discovered the cellular organelle in 1898 using a unique silver staining procedure.

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