Who discovered that electric fields can split light spectral lines, a physical phenomenon known as the Stark Effect? MCQ with Answer and Explanation

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Who discovered that electric fields can split light spectral lines, a physical phenomenon known as the Stark Effect?

A. Hendrik Lorentz

B. Johannes Stark

C. Max Planck

D. Pieter Zeeman

Answer: Option B

Solution (By JKSSB Mock Tests)

Johannes Stark discovered the electric splitting of hydrogen spectral lines in 1913, winning the 1919 Nobel Prize in Physics.

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1

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Who discovered the positron (the antiparticle of the electron) in 1932?

A. Robert Millikan

B. James Chadwick

C. Carl Anderson

D. Paul Dirac

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Correct Answer: Option C

Explanation:
Carl David Anderson discovered the positron using a cloud chamber to analyze cosmic rays, confirming Paul Dirac's theoretical prediction.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2

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Who discovered that atomic particle paths can be tracked via condensation trails inside gas chambers, establishing the Cloud Chamber?

A. Robert Millikan

B. Charles Thomson Rees Wilson

C. Ernest Rutherford

D. J.J. Thomson

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Correct Answer: Option B

Explanation:
C.T.R. Wilson invented the cloud chamber in 1911 to study cloud formations, which became an invaluable tool for nuclear tracking and cosmic ray discoveries.

This question belongs to: Static General Knowledge Inventions and Discoveries