Who discovered that light velocity shifts slightly depending on whether it moves parallel or perpendicular to the Earth's orbit, leading to the famous null result? MCQ with Answer and Explanation

Who discovered that light velocity shifts slightly depending on whether it moves parallel or perpendicular to the Earth's orbit, leading to the famous null result?
A. James Clerk Maxwell
B. Albert Einstein
C. Albert Michelson and Edward Morley
D. Hendrik Lorentz
Answer: Option C
Solution (By JKSSB Mock Tests)
The Michelson-Morley experiment in 1887 found no evidence of the hypothetical luminiferous aether, laying the ground for relativity.

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Practice More Inventions and Discoveries Questions

Question #1
Who discovered that the velocity of chemical reaction pathways balances linearly under specific concentration ratios, establishing the Law of Mass Action?
A. Antoine Lavoisier
B. Robert Boyle
C. Cato Maximilian Guldberg and Peter Waage
D. Jöns Jacob Berzelius

Correct Answer: Option C


Explanation:
Norwegian scientists Guldberg and Waage formulated the mathematical chemical equilibrium rate laws in 1864.

Question #2
Who discovered the first human virus ever identified, the Yellow Fever virus?
A. Walter Reed and his team
B. Robert Koch
C. Louis Pasteur
D. Dmitri Ivanovsky

Correct Answer: Option A


Explanation:
The U.S. Army Yellow Fever Commission led by Walter Reed isolated and proved the disease was caused by a filterable virus vector.

Question #3
The invention of the machine gun is historically associated with which American inventor?
A. John Browning
B. Oliver Winchester
C. Samuel Colt
D. Richard Gatling

Correct Answer: Option D


Explanation:
Richard Gatling invented the Gatling gun, the first highly successful rapid-fire multi-barrel machine gun, during the American Civil War.