Who discovered that light travels in packets of discrete energy called photons, explaining the Photoelectric Effect? MCQ with Answer and Explanation

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Who discovered that light travels in packets of discrete energy called photons, explaining the Photoelectric Effect?

A. Niels Bohr

B. Louis de Broglie

C. Albert Einstein

D. Max Planck

Answer: Option C

Solution (By JKSSB Mock Tests)

Albert Einstein won the 1921 Nobel Prize in Physics for his 1905 paper applying quantum concepts to the photoelectric effect.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered that magnetic fields can split atomic spectral emission lines, a phenomenon known as the Zeeman Effect?

A. Hendrik Lorentz

B. Johannes Stark

C. Pieter Zeeman

D. Max Planck

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Correct Answer: Option C

Explanation:
Zeeman discovered the magnetic line splitting in 1896, which Lorentz explained theoretically, earning them a shared 1902 Nobel Prize.

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Question #2

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The invention of the carbon-14 dating technique to determine the age of organic materials was developed by whom?

A. Marie Curie

B. Willard Libby

C. Otto Hahn

D. Ernest Rutherford

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Correct Answer: Option B

Explanation:
Willard Libby led the team that developed radiocarbon dating in 1949, winning the 1960 Nobel Prize in Chemistry.

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Question #3

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Who discovered the enzyme Lysozyme and later discovered penicillin?

A. Alexander Fleming

B. Edward Jenner

C. Howard Florey

D. Louis Pasteur

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Correct Answer: Option A

Explanation:
Sir Alexander Fleming discovered lysozyme (an antimicrobial enzyme found in tears and saliva) in 1921 before discovering penicillin in 1928.

This question belongs to: Static General Knowledge Inventions and Discoveries

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