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

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

A. Albert Michelson

B. Isaac Newton

C. Léon Foucault

D. Ole Rømer

Answer: Option C

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

No comments yet. Be the first to start the discussion!

Question #1 Report Error

Who invented the safety elevator in 1852, which prevented the cab from falling if the cable broke?

A. Thomas Edison

B. James Watt

C. Henry Bessemer

D. Elisha Otis

Correct Answer: Option D

Explanation:
Elisha Otis invented the elevator safety brake in 1852, making skyscrapers practical and safe.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2 Report Error

Who invented the first commercially practical incandescent light bulb in 1879?

A. Humphry Davy

B. Nikola Tesla

C. Thomas Edison

D. Joseph Swan

Correct Answer: Option C

Explanation:
Thomas Alva Edison developed a fully practical carbon-filament incandescent lamp and public power utility system.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3 Report Error

Who invented the first practical mechanical television system?

A. John Logie Baird

B. Vladimir Zworykin

C. Philo Farnsworth

D. Guglielmo Marconi

Correct Answer: Option A

Explanation:
John Logie Baird demonstrated the first working mechanical television system in the 1920s.

This question belongs to: Static General Knowledge Inventions and Discoveries