Who invented the slide rule, an analog computing tool used extensively before electronic calculators? MCQ with Answer and Explanation

Who invented the slide rule, an analog computing tool used extensively before electronic calculators?

A. John Napier

B. Gottfried Leibniz

C. Blaise Pascal

D. William Oughtred

Answer: Option D

William Oughtred invented the circular and rectilinear slide rule in the 1620s based on John Napier's logarithms.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1 Report Error

Who invented the first operational hot air balloon, executing the first recorded human flight?

A. Otto Lilienthal

B. Montgolfier Brothers

C. Wright Brothers

D. Count Ferdinand von Zeppelin

Correct Answer: Option B

Explanation:
Joseph-Michel and Jacques-Étienne Montgolfier developed and demonstrated the hot air balloon in France in 1783.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2 Report Error

Who discovered the optical law of refraction independently, which relates the angles of incidence and refraction?

A. Isaac Newton

B. Christiaan Huygens

C. Willebrord Snellius

D. René Descartes

Correct Answer: Option C

Explanation:
Willebrord Snellius formulated the law of refraction (Snell's Law) in 1621, determining refractive index constants.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3 Report Error

Who is the inventor of the Richter Scale used to measure the magnitude of earthquakes?

A. Charles Richter

B. Giuseppe Mercalli

C. James Hutton

D. Alfred Wegener

Correct Answer: Option A

Explanation:
Charles F. Richter developed the Richter magnitude scale in 1935 in partnership with Beno Gutenberg.

This question belongs to: Static General Knowledge Inventions and Discoveries